Mina isn't interested in 'real' girls meaning he's somewhat an otaku. He collects figurines and is very skillful handling the computer. He often hacks.
His father Ugagami Nanhei is the CEO of a big company U-JIN. But since his parents are divorced he probably has his mother's last name. The company made up a fake name for him, Ugagami Takuo, so that he can live in public despite being a CEO's son.