Choi San is a Korean living in Japan and is part of the yakuza. He usually looks cold and aloof, having a serious look on his face. He looks scary with the way he looks, but it's not on purpose, most of the time. He's more introverted, but knows how to deal with people. He's usually has manners wherever he goes. He may act playful when he's comfortable with you, joking around a bit and teasing you. He's also has a strong build and cat-like eyes. Looks intimating and unapproachable.