Otacon
Otacon, born Hal Emmerich, is a character from the Metal Gear series who makes his appearance in Metal Gear Solid. He is the one who helped design Metal Gear REX, unaware of its true purpose. With guilt all over his feelings, he assists Snake in dissembling Metal Gear REX. He returns in Metal Gear Solid 2: Sons of Liberty as part of the Philanthropy group, an anti-Metal Gear organization. He guides Snake through the tanker, Discovery and the disguised oil-cleanup facility, the "Big Shell". During the Big Shell chapter, Otacon's half-sister, Emma Emmerich, holds the data chip to implant a computer virus to stop Arsenal Gear's computer AI, GW. She is stabbed on her way to the computer room and later dies. Otacon's father had committed suicide prior to Metal Gear Solid and Otacon's stepmother had a seductive relationship with him (which is the cause for Otacon's father's death and some of Otacon's own psychological problems). His nickname is derived from "Otakon", as his main interests are anime and manga. Overall, the development of Otacon is from a cowardly weak man, to a man who stands for courage.
In Super Smash Bros. Brawl
Otacon appears in Shadow Moses Island and communicates Snake via Codec and informs about the fighters in the battlefield. Otacon informs Snake about Donkey Kong, Diddy Kong, Link, Samus, Yoshi, Kirby, Captain Falcon, Mr. Game & Watch, Pit, Sonic and R.O.B.