プリンセスチュチュ 彩夢芭蕾 彩梦芭蕾 princesstutu
Titular character of Princess Tutu.
She has blue eyes and a bob cut, which is colored both white and orange/pink, and wears a white tutu by default.
She is the alternate form of Ahiru, who has long orange hair and freckles.
If her pendant necklace is removed, she reverts back into her original form: a yellow duck.
This tag implicates ahiru_(princess_tutu) (learn more).