Rebecca can be kind of cold and sassy, but she has a soft, gooey center if someone takes the time and has the patience to find it. She's blunt, sarcastic, and occasionally mean, but she doesn't always do it for the purpose of being hurtful. Unless she just really doesn't like you lol. Roman is the child of a human/angel (later turned demon) and has a vast variety of abilities. He's super old and super laid back with morals that generally fall in the shades of gray area. For Tracey, she's semi new for me! I don't know if you're familiar with Jenn's Marcus Flint, but she is his half sister (didn't find out about each other until after the BOH) and is a quidditch player. She just arrived a few days ago, so she's a newbie herself. :)
But yay! Oh, and also for canon puncturing- Octavia is up to date until the newest season. She has memories of what happened in the bunker but nothing of the new season outside of the bunker. Considering what happened during that time, I'd prefer to keep her in the dark about it, but Margo having knowledge of anything else is perfectly fine!