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Quotation1 That day, I gave up my own unsightly face. And I let go of the old me, the one that was so weak, so that I could become stronger. And then, at last... I obtained the power. The power to make all yield to my will. I... was... REBORN! Quotation2
— Infinite, Sonic Forces

Infinite (インフィニット Infinitto?), formerly known as the "ultimate mercenary" (究極傭兵 Kyūkyoku Yōhei?), is an antagonist that appears in Sonic Forces. He is an anthropomorphic jackal, and was formerly the leader of the Jackal Squad mercenary group. During a raid, Infinite was hired by Dr. Eggman to protect his facility, only for him and his squad to fall at the hands of Shadow the Hedgehog. Ashamed of his loss, Infinite decided to obtain the power of the Phantom Ruby as a means of not only becoming stronger, but to also abandon his "weak", past self.

Concept and creation

During the original drafts, Infinite was originally called "Zero".[3] His final name ("Infinite") was intended to reference the nature of his ability.[4]

According to Shun Nakamura, Infinite was created with an impressive and strong presence in mind since he would be accompanied by old bosses in Sonic Forces. This is the reason why he was made stronger and faster than Sonic the Hedgehog. His nature likewise inspired the staff to elaborate on his origin story. Sonic Team was also peculiar about giving him a cool, but evil design, with his mask being designed especially to emphasize his evil nature.[5]


Infinite is an anthropomorphic jackal with black fur. He has white long and stiff dreadlocks, a white collar of some kind, and white stripes on his back. He also has a bushy tail with a white tip, and wears black gloves with silver streaks on the back, covering his sharp fingers. He also has pointed, metal black hi-tops, with his personal infinity symbol engraved on red soles. His right eye is colored blue, though he has a scar across it, and his left eye is yellow. He also has a medium-long white muzzle with cheek tuffs and a black nose.

Infinite's mask

Infinite grabbing his mask.

After abandoning his old identity, Infinite began wearing a silver-colored mask with large ears with white and black circular patterns on the inside, with the right ear being black with white circular patterns and the left being white with black circular patterns. While his left eye is visible through a red visor, his right eye is covered by a black lightning bolt-shaped piece, similar to an eyepatch, that is connected to his mask's right ear, which glows red when he uses his power.

Infinite possesses the finalized Phantom Ruby prototype that is fused to his chest. When Infinite channels the power of the gemstone, he can surround himself in a red aura, with red, glitch-like pixel particles scattered throughout his body.



SFRoI Infinite

Infinite's original appearance.

Infinite was once the leader of the Jackal Squad, who decided to invade one of Dr. Eggman's bases one day to steal his devices for a bounty. The doctor, who recently discovered the Phantom Ruby, used the newly-found gemstone to conjure an army of Egg Pawns, giving the Jackal Squad some opposition. Infinite commanded his forces to handle the robots as he targeted Eggman straight ahead. Infinite's sword, however, struck against the Phantom Ruby, giving a vision of what Infinite desired the most: a desolate, destroyed world. Eggman, who also saw Infinite's vision, realized that he and the jackal leader together could accomplish their goals. Offering Infinite a chance at joining his side as the Jackal Squad was cornered, Infinite accepted the proposal.[6]

Shadow vs Infinite Episode Shadow

Shadow fighting against Infinite, prior to his transformation.

Later on, Infinite and his squad eventually fell victim to Shadow the Hedgehog, who infiltrated Eggman's Facility, which they were assigned to guard. After being berated by Eggman for his incompetence at protecting the facility, Infinite ambushed Shadow, only to be completely subdued by the brooding hedgehog. Calling the jackal leader worthless, Infinite broke into a tantrum, realizing just how weak and humiliating he truly was.

Infinite would then seek out the alligence of the Eggman Empire, fusing with the finalized Phantom Ruby prototype in an attempt to become stronger and seek out vengeance against Shadow. With his newfound power, Infinite abandoned the former, weak version of himself, gaining a mask to hide his scars, symbolizing his rebirth.

Shortly after obtaining his powers, Infinite was dispatched by Dr. Eggman to deal with E-123 Omega, who had proceeded to slaughter a whole lot of Eggman's henchmen on his way through Eggman's base. Confronting Omega, Infinite proceeded to effortlessly defeat the robot with his abilities.[7]

Sonic Forces

In Sonic Forces, Infinite became the right-hand man of Dr. Eggman.[8] When Eggman attacked a large urban center with his robots, Infinite engaged Sonic the Hedgehog when the latter made short work of Eggman's forces. Overwhelming Sonic with his power, Infinite defeated and captured Sonic.[9][10]


Infinite threatening the Avatar.

After's Sonic's defeat, Infinite provided Eggman with a new power that allowed the doctor to conquer 99% of the planet, resulting in the Eggman Empire controlling that much of the world.[11][12] Instated as the leader of Eggman's entire army,[13][14] Infinite worked alongside Eggman's henchmen (Shadow the Hedgehog, Metal Sonic, Zavok and Chaos) and it is his existence that binds the aforementioned individuals in Eggman's army.[15][16] However, Infinite eventually found opposition in the form of the Resistance.



Infinite attacking innocent bystanders.

Infinite is an enigmatic and mysterious, yet lethal and dark figure.[13] He is cold and stern, though deeply sadistic and cruel.[8] Prior to becoming Infinite, however, he had at least some degree of care for his men in Jackal Squad, as he angrily confronted Shadow over the destruction of the Jackal Squad before fighting him. He is also extremely sadistic, taking great pleasure in the pain and torment of others. He even willingly lets the Avatar run unharmed, just so he could relish in their terrified screams.[17] His violent disposition was present even before his transformation into Infinite, as evidenced by his striking the Phantom Ruby with his sword, causing it to reveal a desolate, war-torn world. It also seems that he greatly dislikes stagnation, admitting as he joined Eggman that he had grown tired and bored of the world, and desired to change it, evidently for the worst, just to provide some amusement.[6]

Extremely collected and confident with a cynical, nonchalant demeanor, Infinite presents himself as perceptive and aloof, toying with and barely sparing his enemies a thought even in direct combat.[13] He also appears rather arrogant and sure about his strength, as he often exhibits a sense of superiority when talking to others and shows little respect for figures like Sonic.[8][13] His arrogance was evident even before becoming Infinite, as he constantly referred to himself as the "Ultimate Mercenary". Fittingly, he also mocks those who find strength in others, believing that one can only rely on themselves, and that friends and allies are nothing more than a "fleeting illusion". He is, however, able to acknowledge attributes to his opponents he deemed commendable, as he acknowledged before attacking Omega that the latter was "spirited"[7] and during his rematch with Sonic, he begrudgingly acknowledges that Sonic had improved since their last time.

His most notable character trait, however, was his inferiority complex, especially regarding any perceived weakness he might have. This was most especially apparent when he fought Shadow and was easily beaten by him. After Shadow bluntly told him he was worthless and told him to not show his "pathetic face" to him ever again, Infinite proceeded to rage about how he was not weak before ultimately subjecting himself to being fused with the Phantom Ruby prototype, and completely discarding any trace of his old identity, to the point where he refused to show his own face. Other indications of this trait were shown where he expressed disgust at Eggman calling a retreat, viewing it as a tacit admission to weakness. Even after his defeat, Infinite tries to insist that he can fight on, even as he is pulled from the battlefield. This inferiority complex is implied to have developed into a mad obsession with strength. When Shadow runs through a Phantom Ruby-made Green Hill, Infinite's thoughts are echoed through a false Omega, constantly repeating that he was not weak, almost like a paranoid reassurance, showing Infinite as a truly insecure individual.

Owing to his obsession with strength, Infinite also demonstrates a Darwinian view of life, which is especially evident with his fight against the Avatar at Metropolis, where he declares that the weak ultimately exist solely to be vanquished by the strong, and later his admission that he underestimated how desperately the feeble will cling to life when the Avatar managed to hold their own against him.

Powers and abilities


Infinite summoning energy cubes.

Described as powerful, Infinite is said to possess a strange ability.[18][13] His power surpasses even that of Sonic's, whom he was able to defeat in combat with relative ease.[13][16] He was also able to effortlessly defeat E-123 Omega in a flash.[7] Likewise, Infinite was also capable of defeating Silver the Hedgehog with ease.

After gaining the Phantom Ruby's power, Infinite obtained unprecedented speed and acceleration that surpasses even that of Sonic himself, able to easily dodge one of Sonic's attacks even when he was boosting at point-blank range and move several meters almost instantaneously.[17][13] He possesses far greater strength than Sonic as well,[16] enough to knock away someone of Sonic's size with enough force to crack a concrete arch upon impact.[13] Prior to being fused with the Phantom Ruby, he was skilled at swordplay,[6] and was shown to be fairly fast and agile in his movements, although his speed was easily outclassed by Shadow's Chaos Control abilities.

Due to Infinite's fusion with the finalized version of the Phantom Ruby prototypes, he acquired the ability to generate, destroy and/or manipulate virtual realities. The virtual realities in question are said to be illusions, and these illusions are generated by distorting the spatial (depth) and visual (optical) information perceived by a living target of intention. The effects of the virtual realities created by the Phantom Ruby are said to be potent enough to cause any illusory injury due to their influence, to affect the victim's physical body. In battle, Infinite primarily uses the Phantom Ruby to generate a large supply of crimson red cubes that he can skillfully and willingly move around. If an opponent is struck by these cubes, they will be sent into a Virtual Reality. He can generate and arrange a large numbers of these cubes into a variety of different forms. He can also use them to manifest other objects, such as turrets for example.[18][13]


Using the Phantom Ruby, Infinite is able to create monstrous clones of himself.

Infinite can also use the ruby's power to create virtual reality constructs that cause victims to falsely perceive the presence of other characters, such as Zavok and Chaos. These constructs are described by Shadow as having "mass and form, but no heart or soul". These constructs, so long as Infinite desires, can also carry the memories, powers, and personalities of the originals. He can also alter them to make them stronger than the originals such as making Metal Sonic bigger and granting him the ability to use electrified versions of his energy cubes as well as materialize objects to use as a shield. Infinite can also use the Ruby's power to alter his own appearance such as making himself bigger for his final battle with Sonic. Using the Phantom Ruby's power, Infinite is also capable of creating Null Spaces, which are seemingly inescapable voids in space-time that function similar to that of a black hole. Some of Infinite's other Phantom Ruby-based skills include the ability to fire energy blasts from his hands, the ability to teleport in a manner that makes it seems as if his body is being deconstructed into cuboid objects, and the ability to levitate through the atmosphere and through space.[8]


Prior to receiving the Phantom Ruby's power, Infinite possessed a red sword, which he used with great proficiency, using it to slice through robots with ease.


While the Phantom Ruby's powers of illusion are formidable, they can be countered by someone who has a Phantom Ruby as well as the Avatar was able to survive Infinite's illusion during their fight in Metropolis and was able to foil Eggman's plan to destroy the Resistance with a virtual replica of the sun. Likewise, the Phantom Ruby's illusions only work if the target is within the Ruby's field of effect. Also, the Phantom Ruby requires a tremendous amount of energy to function, such as the energy provided by the Death Egg. Should its energy supply be cut off, the Phantom Ruby would be rendered inert. This weakness, however, was not fully exploited as Eggman had a back-up energy source built under Metropolis in the event of the Death Egg's destruction.

Another weakness of Infinite's is his extreme sense of pride and constant need to satisfy his sadism. When Infinite destroys the Avatar's squad, he willingly lets them run away unharmed as he enjoyed the sounds of their screams. Later, when he has Sonic at his mercy a second time, rather than finishing him there and then, he just leaves, seeing Sonic as something he need not bother himself with, something that Eggman himself chewed the jackal out for. Both these actions proved to be Infinite's downfall when Sonic and the Avatar ended up beating him together.


Shadow the Hedgehog

Screenshot 20171107-202957

Infinite trying to attack Shadow.

Arguably the person who had the most impact on Infinite was Shadow the Hedgehog. After his squad was destroyed by the brooding hedgehog during an attack on Eggman's base, Infinite, furious, attempted to attack him, only to be effortlessly defeated. Before he left, Shadow made clear his disgust, and demanded never to see his "pathetic face" again. Infuriated that he'd been humiliated, the mercenary took Shadow's words to heart, and went on to discard all remnants of his old life, becoming the entity known as Infinite.

Much later, Infinite once again encountered Shadow, having defeated Omega, and was ecstatic, though Shadow failed to remember him. Infinite's reaction to this was to cast Shadow into a false interpretation of Green Hill, where Shadow would be falsely contacted by an Omega who at first, seemed to be perfectly normal, but as time progressed, soon devolved into incessantly repeating that he was not weak. Infinite later uses a false Shadow to help instill fear into the Resistance during Eggman's reign.

It's implied that Infinite was afraid of Shadow before he took his current identity, visibly trembling as the hedgehog criticized him.

Sonic the Hedgehog

Screenshot 20171110-194002

Infinite facing Sonic.

His first meeting with Sonic the Hedgehog had him beating the blue hedgehog effortlessly. This ultimately had Infinite's ego receiving a massive boost. When meeting Sonic for the first time since he defeated him at Mystic Jungle, Infinite proceeded to sense a smell from Sonic and assumed the smell was fear of encountering him due to last time, though Sonic corrected him and explained the smell was actually sweat due to Sonic having ran all the way there, and also smugly explained that Infinite had not left an impression on him at all. Because of his beating Sonic twice, he proceeded to spare him, solely because he deemed him not worth killing. However, he does express shock that Sonic held his own for longer than he expected, due to his data indicating he won't be a challenge from last time before ultimately threatening to have him "hold [his] tongue" next time they fight. This would ultimately prove to be his downfall, as not only did Sonic proceed to inspire the Avatar to fight off against him, but both Sonic and the Avatar proceeded to bring him down for the count even with a fully charged Phantom Ruby.

Similar to Erazor Djinn, Infinite also derogatorily referred to Sonic as a "filthy sewer rat", with Sonic asking if he's ever seen a hedgehog before, and even offering to "show [Infinite] his spines."



Infinite meeting the Avatar.

Infinite had a personal connection with Avatar, as he had been responsible for slaughtering their friends during one of his raids during the six months between Sonic's defeat at his hands and the Avatar's joining of the Resistance, with Infinite ultimately sparing them simply to satiate his more sadistic nature of watching them flee in terror. They later re-encountered each other at Metropolis, with Infinite trying to intimidate Avatar, although they, due to Sonic's word of encouragement, ultimately chose to fight Infinite instead of giving in to fear. Infinite then tried to finish them off when remembering who they were, although due to Avatar's possession of a Phantom Ruby prototype, they managed to evade the attack, leaving Infinite shocked before ultimately dismissing the matter and leaving them be. Ultimately, the Avatar alongside Sonic ended up bringing him down for the count.

Dr. Eggman

Screenshot 20171110-193624

Infinite and Dr. Eggman.

When Infinite and his squad raided Dr. Eggman's base for weapons to sell, the doctor's army overwhelmed them, and the Phantom Ruby allowed Eggman to get the upper hand against Infinite. Impressed by the jackal, Eggman offered him a place in the Eggman Empire. Infinite, having grown bored with his life, agreed to his proposition. Infinite was later a willing subject in the Phantom Ruby experiments, and had the final version merged with his very being.

Following Eggman's domination of the Earth, Infinite would continue to prove loyal to the doctor, serving as his right-hand and enforcer, though he did not hesitate to voice his displeasure with some of Eggman's choices, and openly acknowledged himself as the better of the two, giving him somewhat more of an equal footing with the doctor than most. Interestingly, Infinite is one of the only powerful entities that Eggman aligned himself with who did not end up betraying him.

Jackal Squad


Infinite with his squad.

It would seem that Infinite was close to his former squadmates in the Jackal Squad, as he was furious when Shadow destroyed them. Likewise, the rest of the squad seemed to place a lot of faith and trust in Infinite, believing that they could survive on their own, though ultimately, Infinite's desire to end his boredom proved more important to him than the interests of his teammates.

Silver the Hedgehog

Infinite briefly encountered Silver the Hedgehog at Mystic Jungle. He admitted that killing Silver was not part of his agenda, but he was more than happy to do so due to his belief that it would keep "the rabble" in line to demonstrate that hope is not worth holding on to. However, Silver was unshaken by his claims before fighting him. However, he ended up defeated easily by Infinite, and would have been killed had Sonic not interfered. Ironically, Silver, during this battle ended up sewing the seeds for Infinite's ultimate defeat as well as the failure of Eggman's plan to use an artificial sun to destroy the Resistance, as during their battle, one of Silver's blows caused one of Infinite's Phantom Ruby prototypes to be discarded, with Infinite not noticing this.




"Heh... You are spirited. I'll give you that. Very well. My new power will be the last thing you see!"
—Infinite confronting E-123 Omega, Sonic Forces: Looming Shadow
"I... I'm shaking... Me? Me... Afraid?! Ugh. Pathetic?! Me... He's calling ME weak!? No... I am not Weak. I'm... I'm not. I'm not weak! I AM NOT WEEEEAAAAAAK URRRAAAAAAAAAAAGH!"
—Infinite after getting defeated by Shadow and throwing a tantrum, Episode Shadow
"Ah, and still more wonderful, a not-so-tall, dark and brooding guest has arrived. I've been waiting for you, Shadow."
—Infinite meeting Shadow again, Episode Shadow.
"I can taste your terror, child. All that anxiety and doubt... It's delicious."
—Infinite taunting the Avatar
"Well, look who's back from the dead. The little blue savior. But what's that I smell? You reek of fear. Glad to see I left an impression."
—Infinite facing Sonic a second time
"Fine... I will teach you fear, then pain, and then... well, at least the fear and pain will end."
—Infinite about to fight the Avatar
"And with that, the disposal of the Phantom Ruby prototype is complete."
—Infinite destroying the Phantom Ruby prototype.
"Pathetic little hedgehog. Even with the Phantom Ruby weakened, I still have enough power to smash you into blue jelly."
—Infinite facing Sonic a third time.
"No, wait! I can still fight!"
—Infinite after being defeated by Sonic and the Avatar.

Theme songs


  • Infinite is the second Sonic character to be depicted with heterochromia, with the first being the Commander.
    • He is also not the first character with a personal grudge against Shadow to gain red sclera and power up to an even more dangerous form that threatens the entire world; that honor would go to Mephiles the Dark. Coincidentally, both Dan Green (Mephiles' voice actor) and Liam O'Brien (Infinite's voice actor) both voiced anime incarnations of Ganryou of the Ikki Tousen franchise.
  • Infinite has a brief cameo in the "Come Join the Eggman Empire" propaganda video nearing the end, where he emerges from behind the Egg Pawns when Eggman claims that the possibilities for those under his Empire are "infinite", acting as a subtle pun.[19]
  • Infinite is the most frequently fought boss in Sonic Forces, fought a total of three times over the course of the game.
  • Infinite is the second villain which disparagingly refers to Sonic as a rat with Sonic correcting him regarding his actual species. The first is Erazor Djinn.


  1. VOICE OF Infinite. Behind the voice actors. Retrieved on 7 November 2017.
  2. Sonic Forces Episode Shadow
  3. Shun Nakamura on Twitter (Japanese) (15 July 2017). Retrieved on 15 July 2017. “Shun Nakamura: インフィニットは、原案ではゼロという名でした。”
  4. Sonic Forces - TGS 2017 Otakumode Interview (33:17). YouTube (23 September 2017). Retrieved on 24 December 2017. “Shun Nakamura (as translated by board's translator): So about Infinite... ah, I can't really tell you what his power... his power is, but I can you that, uh, his name has something to do about his special ability, but I am not gonna reveal more than that.”
  5. KitKat (27 October 2017). A long Sonic Forces interview with Iizuka and Nakamura. Sonic United. Retrieved on 4 November 2017.
  6. 6.0 6.1 6.2 Sonic Forces: Rise of Infinite, "Rise of Infinite"
  7. 7.0 7.1 7.2 Sonic Forces: Looming Shadow, "Looming Shadow"
  8. 8.0 8.1 8.2 8.3 Sonic Forces - Story Trailer (English). YouTube. Sega (22 September 2017). Retrieved on 22 September 2017. “Eggman has taken over the world. It's up to Sonic and the resistance to liberate it from his iron fists. But things won't be so simple with Eggman's new right-hand man, the mysterious Infinite. Get ready to take back the planet.”
  9. Sonic Forces English instruction manual
  10. Sonic Forces English instruction manual
  11. Sonic Forces Japanese website (Japanese). Characters. Archived from the original on 11 September 2017. Retrieved on 11 September 2017.
  12. SSF1991 (12 April 2017). Famitsu Has Released New Information On Sonic Mania & Forces, Iizuka Interview. Retrieved on 12 April 2017.
  13. 13.0 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 Sonic Forces - Enter Infinite. YouTube. Sega (20 June 2017). Retrieved on 20 June 2017. “Meet Infinite, a mysterious new foe in Sonic Forces with even stranger powers. With Eggman's army on the rise and Infinite at the tip of the spear, even Sonic and his strongest allies are in for a fight they won't soon forget.”
  14. Sonic Forces producers on the Avatar and story plus more, brief Sonic Mania talk (Japanese). Famitsu (14 June 2017). Retrieved on 8 August 2017.
  15. SEGA® Releases New Sonic Forces™ Trailer and Key Art. Gamasutra (13 June 2017). Retrieved on 14 June 2017.
  16. 16.0 16.1 16.2 media:SFscan 15.jpg
  17. 17.0 17.1 『ソニックフォース』プロモーション映像 (Japanese). YouTube. Sega (13 September 2017). Retrieved on 14 September 2017.
  18. 18.0 18.1 Sonic Forces - E3 Trailer. YouTube (13 June 2017). Retrieved on 15 June 2017. “In a world conquered by Dr. Eggman, it’s up to Modern Sonic, Classic Sonic, and your own Custom Character to fight back. Even together, the three heroes won’t have it easy – Eggman has assembled his own roster of all-star villains, including a mysterious new enemy with an even stranger ability…”
  19. Come Join the Eggman Empire!. YouTube. Sega (2 November 2017). Retrieved on 3 November 2017.

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