Hiii, Josie!  Welcome to Charming!  I'm Finn. I don't have a ton of options for you, but here's who I have:

Clementine Rookwood is a fellow 6th year in Hufflepuff. She is incredibly nice and a 'mom friend.'  She is an orphan who lives at St. Mungo's Home for Inconvenient Children. She is hoping to be a potioneer, herbologist, or maybe even a mediwitch after Hogwarts. (She hasn't decided.)  She is feminine, but she wouldn't mind if Gigi was a tomboy. (Though, she might be concerned for her future.)  She is very confused and starting to have crushes on other girls.

Thomas Montgomery is a fifth year Ravenclaw.  His mother ran away with a pornographer in his first year.  He is obsessed with transfiguration. He is a very loyal friend.  They probably would have been in a few classes last year.

I have a couple other Hogwarts characters, but they are first and second years. Fleur Rey is a sweet Hufflepuff second year obsessed with baking. Archer Belby is a walking disaster, anxious second year Ravenclaw. Jasper Diggory is a muggleborn first year Hufflepuff.

Welcome to Charming!!