Boi was the first of three original characters by traditional media artist Redboi. According to a character sheet, Boi is a shy, submissive eighteen-year-old human – he was presumably Redboi's original self-insert character, before this role was succeeded by Redboi's two current original characters, the sexually adventurous demon Red and Blue, a human who is practically identical to Boi. Boi was often depicted by Redboi as wearing a collar, and regularly engaging in homosexual big dom/small sub intercourse with larger anthro characters, such as Toffee from Star vs. the Forces of Evil and Panther Caroso from the Star Fox series.