My age range matches are Bronwyn Moony who could fit multiple categories. She is WC though, a year ahead and a Ravenclaw, but her sexuality is fluid and I feel like she might get a kick out of Chris's personality.

Eva and Angie Swan are both in her age range and fairly easy going about friends.

Lennox Vaillancourt was in her year as a Slytherin and would also be amused by her.