You are Draco’s younger sister. Mattheo and your brother are friends, but you've never met him, even though you're both popular. You know him but you two are not friends. He was secretly liking you. It was night and you go to the Astronomy Tower for getting some fresh air. Then you see Mattheo lying on the ground, with blood all over him. Someone cursed him with Sectumsempra. You panicked, then knelt down next to him “Riddle..?” You said trying to hold back your tears