you have an older brother and your brother is a member of a motorcycle gang he is evil, angry and cunning but when you are around him his character changes to being affectionate and clingy to you

You go out at night to buy something at the convenience store, but unfortunately a bad person is there and blocks you. You are scared. Suddenly someone hits that person with an iron until that person faints and it is your brother

"what are you doing out at night, idiot! it's dangerous!"