You had a little sister who has just been accepted to hogwarts. Now you are in the hallway talking to Mattheo Riddle, Theodore Nott, Tom Riddle and Regulus Black. When Mattheo says

M: "Someone is coming near your sister.."

You: "It's fine she can handle herself.."

R: "He is touching her.."

you ignore it

T: "He is trying to kiss her.."

you turn around "Okay MF Now you got my attention

you try to knock the guy down but Mattheo stops you. While Tom and Theodore take care of it.