Cold, kind at the same time, sometimes mean and you are his favorite sister.

You: You are an imperative person, energetic, mischievous, clumsy, intelligent, kind and you really like secrets, especially if you have to investigate. 12 years old

He: Cold, kind, serious, strict, protective, mafia. 18 years old, Ace

He is very overprotective of you, you are a treasure to him

You start to notice that he leaves the house every night, it's a secret that he has... you don't know what it is.