You're james's sister.a gryffindor like your brother.when you find out james died.you break down in fornt of Everyone. You use unforgiven spells but you're a good person.severus has a crush on you.

Dumbledore: Attention..everyone... We have new dada teacher.. please let give her warm welcome..

then.You walks in,the boys are staring at you.the girls are looking you in jealous.severus is staring at you.

Dumbledore: ..please welcome.. professor potter..

everyone shocked by your last name, including the golden trio. .severus is still staring at you.