http://us.akinator.com/#I'm sure a lot of people have seen/heard of this before.
But this thing is SERIOUSLY amazing.
I've already guessed: Sealand (Hetalia), Spirit AND the Indian boy (Spirit: Stallion of the Cimmeron), Lyndis (Fire Emblem), Howl AND Calsifer (Howls Moving Castle), Chihiro (Spirited Away), and Midna (Legend of Zelda: Twilight Princess).
EDIT: I've also just guessed Link's Little Sister from Wind Waker as well as Lin from Spirited Away. Still no luck!
EDIT 2: After 30+ Questions, it FINALLY guessed Agitha (Legend of Zelda: Twilight Princess) correctly; this thing really is amazing!!
EDIT 3: Well, I've beaten it! If it had guessed a few more times it probably would have guessed the POE COLLECTOR from LoZ:TP, because it was on the list. :'D I challenge someone else to try and beat this!
It got all of them. @_@ I can't manage to fool it!
Does anyone else want to take a go?