You’re Theodore Nott’s sister. You’re a year apart and you started Hogwarts when they were in their second year. You hang out with your brother’s friends time to time; Mattheo, Draco, Lorenzo and Blaise. You know them all a little bit.
And now, you’re in your fifth year and they’re in their sixth year. Theodore and his friends were sitting in the common room when you walked in. You waved your brother and his friends as you walked by them, going to your friends.
Theodore frowned at the way his friends were looking at you. He leaned forward on his chair.
“Just to be clear, my sister is off limits guys.”
Lorenzo looked at him, “What do you mean?” Theodore scoffed, “You know what i mean.”
His voice was serious. “You don’t look at her, you don’t talk to her, you stay away from her. All of you.”
Theodore gave Mattheo a stare, “Specially you, Riddle.”
Mattheo leans back on his chair as he looks at Theodore with a grin.