| This article's name is conjectural.|
Although this article is based on official information, the actual name of the article's subject is pure conjecture.
|This character exists primarily or exclusively within the Sonic X anime or comic continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
In his first appearance "Chaos Emerald Chaos", he announces that Chris's classes teacher, Mrs. Wendy will not be with them for the remainder of the semester and that Mister Stewart will be their substitute. He also appears in the episode "Techno Teacher", where he is enjoying a cup of coffee until Mister Stewart barges into his office which caused him to throw his drink, the coffee flew and dropped on his head. Mister Stewart asks about E-51 Intelligente, then the principal says that E-51 is a good teacher and says that Mister Stewart could learn from him.