Faye, from Cowboy Bebop. She is frustratingly stupid and always takes the piss outta Spike (I like Spike, he's the man and Faye is a bitch), plus she always loses them money from doing something stupid - she just sucks in general.
Rikka from Shugo Chara. Sometimes I think she's ok...but she can be really annoying and it always seems like she's trying to steal the spotlight from the main characters when she, herself, is a filler character. -_-
this sounds odd but i kind of find otome's main character of harem's anooying..well..don't get this wrong i luv them and the same feeling annoying..example starry sky(Tsukiko Yahisa),fruit basket(tohru honda)<uta no prince(Haruka Nanami)shugo chara(amu hinamori)and all the otome's games main character and harem(character that serounded door girls of boys)...BUT STILL LOVE THEM(they r my fav character after all)...and fans..please don't kill me