Wheeeeee, I wanna join in XD
Hit Mulciber - sixth year, Gryffindor. She should be a seventh year, but obviously isn't (lel). She's adventurous and is training to be an Auror. She's always around Cronis and Evander Yaxley but is best friends with Ryo Hiroku. She's recently become interested in Dax, though she isn't sure why. And as Jackles mentioned, she's recently found out that Finn's a vampire.
Cronis Yaxley - sixth year, Slytherin. The heir of the Yaxley family. He likes to act like he's a cool kid but he's really more meek than he appears. He's crushing on Hit even though she's clearly told him that she's not interested, which makes it so much more funny. He loves to pick on his brother. His best friend is from the Podmore family.
Evander Yaxley - sixth year, Ravenclaw. Evander's always in his brother's shadow and that's to be expected since he's usually a very shy person. He looks to Hit for protection, usually, and advice when it comes to Cronis and how to deal with him. Evan's basically in love with Kit Avery and pretty much feels lost without her at Hogwarts. (He might be thinking about dropping out, shh).
I think that's all of 'em. And I might as well include this one:
Freyja Podmore - sixth year, Gryffindor. She's a WIP but the jist when it comes to her is that she's Cronis' best friend, the only one who knows his secret and she watches out for him. She's being nosy about him and Hit, trying to see if she can set them up, but she's failing. Cronis thinks of her like a sister (but there's a chance she has a crush on him.)