Okabe Rintarou Hentai: Próifíl Carachtar & Bailiúchán

The protagonist of Steins;Gate and Steins;Gate 0. Also known as Hououin Kyouma (鳳凰院 凶真) and Okarin (オカリン). He has short black hair and yellow eyes. In Steins;Gate, he wears a white shirt, brown pants, and a lab coat with a red pen in its breast pocket. In Steins;Gate 0, he instead wears a collared black shirt, black pants and a black coat with the red pen still in the breast pocket. (Source: Danbooru Wiki)