The Scrappy: A lot of fans feel this way about Yukino for her actions at the end of volume two.
The Woobie: Surprisingly not Yukino, but Mari's friend Oozawa who has a hopeless crush on Yukino.
Jerkass Woobie: Yukino fits this dynamic pretty well, you feel sorry for her but most of her problems are her own fault and she delves into wangst way to much.