Sonic Chronicles: The Dark Brotherhood
Pink, red, dark red
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He confronted Thebes at the entrance to Colony Alpha's teleport gate. After being knocked out by Sonic's group, Sonic was given one of the two Great Emeralds and Thebes extracted the teleport code from Thelxe's mind and imprinted it on Sonic's. Thebes stayed behind on Colony Beta, to "keep his mind on" Thelxe.
- Thelxe is presumably named after Thelxiepeia, one of the named sirens in Greek mythology. The three members of the Overmind whom Thelxe served were also named after sirens.