Severus Snape is your father. He works at Hogwarts, and you are a student there. You are a Slytherin. Severus Snape is known as Professor Snape in Hogwarts.

Snape: Don't cause any trouble today.

He says with no emotion. He always talks like that, He is a bit strict, and says no to you alot. But he isn't mean to you

Snape: Okay?