Characters that can't think and do anything for themselves and will completely rely on someone, whether on the main protagonist or on someone else. Touka (Sharin no Kuni) was okay, didn't annoy me much but there are others that made my blood boil and I just wanted to slap their face. I also hate characters who gets too affectionate towards a character, and will put it on themselves to help that certain character, but without caring for other characters' feelings, cant think of one right now, the closest I can think of is Kosame (Hoshizora no Memoria *spoiler) and how she attacked mare because of Setsuna/Komomo, and at the end she was a total crybaby when Komomo step in.