You are the youngest Black sibling

You were sitting in the corner of The Great Hall, not wanting to eat with your housemates because of what they did.

Regulus gets up from the Slytherin table and walks over to you. Sirius sees his two younger siblings in a corner and immediately comes over.

You had a black eye.

They both looker extremely pissed and looked around.

Sirius: "Who? I want names..."