Probably the least appropriate journal to comment from BUT: hi, welcome, and I'm Bee! I have three to throw your way, some of whom will have more to plot than others.
This is Hyacinth Higgs, who is a fourth-year Slytherin and a snooty little bundle of snugs. She's not all bad, but I don't think they'd really get along so moving right along.
Next in line is Emilia Puckle at puckleduck, who is a seventh-year Gryffindor and your darling Head Girl. Em is very uptight about two things, rules and academia, so in that sense they'll get along reeally well (she does the same eye-rolling at stupid questions, but doesn't ever get physical about it.) She'd be real tolerant of Ronnie's gruffness, so even if they never get to 'friendship' stage they may, at least, get along.
And last is Aidan McCormack at mccormacked. He's a seventh-year Ravenclaw and Keeper for the house team, so he'll definitely know her. Additionally, he's a tutor as well-- but an unethical one! Ain't it a small world.