Possessive knight

You're walking down the hall with Tristan, your guard by your side, whose look is the same as always, cold and expressionless. The Duke (John) sees you and smirks, walking over to you and reaching out to touch you. Without a word, Tristan punches the Duke in the stomach, making him double over in pain. Your guard grabs your arm and pulls you to him, his hands on your waist possessively as he says, "No one touches my princess."