This chick better be his cousin or his aunty or something

¹ of course she is. Look at her hair color and eye color. Accordance to anime rules, that means she's related. God forbid in anime world, that families would be of different races and hair color and eye color. God anime is so limited and judgmental.

Dude it’s not that serious

Nah it isn't but still... if someone was color blind, everyone would look alike