In both the Sailor Moon and Codename: Sailor V manga series, Motoki works part-time at both the Game Center Crown and the Crown Fruit Parlor. Within the first arc of the manga, he discovers the true identities of the Sailor Senshi but promised not to tell anyone.
Motoki is a tall young man with a medium skin tone, green eyes, and blonde hair with bangs that curl in the front, like most other characters. He is almost always seen wearing his work uniform of a dress shirt, dark pants and an apron.
The kanji in his family name means "old" or "ancient" (古) and "banner", "pennant", or "flag" (幡). The kanji in his given name means "first" or "origin" (元) and "base" (基).