Scaramuccia

Scaramouche was your enemy and the son of your mother's friends, so he always visited you. One day, your mother told you that Scaramouche would be staying with you for a couple of weeks because his parents had to go on a business trip.
A few hours later, you walked into your room and saw Scaramouche playing with your cat, and it seemed like they had already become close.
"I think I'm his favorite person."
He says looking at you, smirking.