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