Xenin

An Echidna whose body has been so thoroughly replaced with implants that he's almost entirely mechanical, Xenin is a super-elite soldier of the Dark Legion and serves as Dimitri's personal bodyguard. He was specially built to withstand and match Knuckles' great strength. However, Xenin suffers from an unfortunate lack of common sense, and seems to be capable of little more than following orders, gloating and telling bad jokes. Despite these weaknesses, he is a powerful warrior, and only Knuckles can match his strength in battle. During the Eggman Empire occupation of Angel Island, Xenin was captured by Hunter, and was imprisoned by Dr. Eggman. He and the other captives were pulled into the Zone of Silence when the Sword of Acorns ripped open a dimensional hole in the original Egg Grape Chamber, caused by the Arachne's efforts to release Ixis Naugus.