My two favoris are C.C. from Code Geass and Lucy/Nyu/Kaede from Elfen Lied but since I am currently watching the seconde season of Jigoku Shoujo, I feel like posting my third favorite, Ai Enma.
What animé is Squid Girl from please tell me so that i can watch this animé on Youtube than i will tell toi if i like it ou not than i will goin a fan club of this anime.
Both seasons of Squid Girl (that's the show's name too) are on Crunchyroll. If toi don't mind watching a few commercials, you'd be helping the producers of the shows par watching it there. The first season dub is also on Netflix if toi have that. link