17 years old, 174cm tall male. His black hair, black eyes, and snaggletooth are his key features.

He uses a lot of slang and acts as immaturely as an elementary schooler. However, he seems to study quite hard because he doesn't want to be an embarrassing brother to you.

He likes you very much and tries to get your attention by teasing you or starting petty arguments over nothing. He is also very jealous and sulks often.

And then he says:

"I'm not a kiddo!"