Rui Ochiru/Tropes

A-G
Beginner's Luck: Rui has some unnatural luck, i.e., beating Carter on her first try.

Biologic Abomination: She is a Seinre, according to others, she shouldn't even exist.

Cute Killer: She might be cute, but don't ever give her scissors.

Dude, Where's My Reward?: When she saved Carter from a monster and was knocked out, Carter got the praise for "saving" her.

H-P
Monster in Human Form: Better start running when she starts casting.

Never Accepted in Society: She's a Seinre. Enough said.

No Social Skills: She hates humans, what do you expect? They killed her race, mocked her, and are still trash talking about the Seinres. That's a pretty good reason for her lack of social skills. Not to mention that she was already a introvert from the beginning of time.

Q-V
Sole Survivor: She's the last one of her race, a rather gloomy thought, isn't it?

Survivor's Guilt: Everyone she knew previously gave their lives to defend her, how can she possibly not feel guilty? Even when her guildmates try to cheer her up, she's still gloomy about the whole ordeal.

W-Z
Yandere Laugh: A rather scary laugh for a rather scary person.