Hey, it's me, Crystal, with my fourth and probably final character, Charlotte Bott!
Charlotte is a 5th year Ravenclaw, and before you ask, yes she is related to Bertie Bott of Bertie Bott's Every Flavor Beans fame. He's her grandpa. She gets a lot of free candy thanks to her dad and grandpa being in the family business of candy making, and uses it to bribe people to test her experimental potions. Speaking of potions, she's a prodigy in that subject. She's a little annoying in Potions class- she's that kid who knows all the answers and wants to show off. That said, she's not condescending or smug about the fact that she knows more than most of the other kids, she just likes the validation of being right (unless they try to prove her wrong, and then she might be a little smug when she turns out to be right) and doesn't realize she's being annoying. A more advanced class might be better for her, but since skipping isn't done, her classmates will have to deal with her.
Charlotte also has an artistic side, and likes making jewelry, knitting, and music. She plays the trombone (feel free to have your Ravenclaw characters complain about her playing in the R5 girls dorm or the common room- she's not bad at it, but it can probably get annoying when you want peace and quiet and there's a trombone playing two feet from you), and if any other characters might be interested in one, may get a school band or orchestra going. She has an odd sense of style, which sometimes looks really cool, but other times is a hot mess. She likes standing out- she sees it as better than disappearing into the crowd, even if it does mean getting made fun of. You can read more about her
here.
Plots of all kinds are wanted, so bring them on!