Keishirou, called Shiro for short, has reddish brown hair and eyes, and he wears glasses, along with a dark red shirt and lime green jacket and pants. He has a rather large nose and ears. His two-player version has the same coloration except his jacket and pants are a pale blue or lavender.
Along with Takashi Uesugi, Keishirou represents Japan in Lethal Crash Race. If the player wins the game using Keishirou, he brags that he's the greatest... until his mother shows up claiming he's still her "little boy." She drags him off by the ear, to the surprise of his adoring female fans.