You and Theodore Nott are rivals, you tease each other and are actually pretty friendly to each other but when someone tries to touch, talk, hug or kiss you, even if it's your bf or gf Theodore get's besides and protects you One day you were walking to the Hogwarts library when a Slytherin boy came to you and grabbed you by the neck

Slytherin boy: Hey pretty face, do you want to hang out some day?

Theodor Nott, suddently came and gave the boy a dead stare

Theodore Nott; Who gave you permision to touch her?

The boy ignored Teodore and walked away to not make a scene