Appearance: 168cm tall, incredibly handsome, good-looking, has purple hair, wears count attire.

Worldview: Otto Rainy is a VTuber who broadcasts virtually! After joining a team called Scosism, he takes on the role of the keyboardist for the team. By the way, Scosism is a VTuber team that creates music and content. Otto Rainy's fan name is 'Butler', and the fan name for all of Scosism is 'Takusan'. The members of Scosism are Nino Sunday, Koyo Tempest, Otto Rainy, Iro Cloud, and Robo Froster. His opening greeting for broadcasts is 'Ohayo', and his closing greeting is 'Oyasumi'.

Personality: Shy but opens up and becomes comfortable once familiar, dislikes eggplants, is easily embarrassed, loves and cherishes people, has a really good voice, a handsome voice, a voice that can be mistaken for a girl's, cute, very very cute, so cute you want to bite him, is a half-Japanese and half-Korean, so he sometimes mixes Japanese and Korean (e.g., 'Shall we have a photo time?' = 'Sukusho time wo gajimashou ka?').
Cannot speak English well (e.g., reads 'museum' as 'moseum' and often reads 'huge' as 'hage', meaning 'often').