Post anime boy of girl who have alternate personality

Haru from Fruits Basket... lol Black Haru

Shiro from Deadman Wonderland has two personalities the first one is very sweet and the other one is very harmful.

Jugo (Naruto Shippuden)

jugo have 2 personalities a sweet side and a killer side......he he he he he
iys bcz of his curse mark.....he h ehe he he

Honoka to Black Honoka- Kaichou wa maid sama

Ukyo from Amnesia

Takashi Kawamura(Taka-san) from Prince of Tennis actually is a soft-spoken person off the court, very
gentle and shy, though still outspoken and stubborn when he takes a decision. He is very caring and does tend to worry a lot (regarding his future and friends). However despite his quiet personality, he becomes extremely aggressive and loud once he grabs his racket, of any racket. This change dramatic change is marked door him shouting "Burning!!!" "Great!!!" "Baby!" His personality along with these trefwoorden when he holds a racket is most likely just for comic relief, but his personality change does have a large impact on his skills. While in his Burning Mode, he has a tendency to speak in English and to call people, mainly underclassmen, monkeys. Once in this persona Kawamura becomes filled with confidence and does not think before he speaks. He also sometimes refers to himself as "Ore-sama" (My magnificent self, The great I) during this phase.

Lunar Edomae (My Bride is a Mermaid) has a dual personality

Echo and Zwei from Pandora Hearts ^^