Duck

Duck (Ahiru) is a friendly, kind-hearted duck who was turned into a pre-teen girl by Drosselmeyer with a magical pendant. Due to her true nature, she tends to act very duck-like, talking loudly and excessively, and is easily excitable and clumsy. She is also friendly with other birds around campus, feeding them each morning. If Duck removes the pendant or quacks while talking, she transforms back into a duck and must touch water while wearing the pendant to return to her human form. The pendant also allows Duck to transform into Princess Tutu. As Princess Tutu, Duck is wise, graceful, elegant, and a distinctly better dancer. Duck/Tutu is initially in love with the prince, but if she confesses her love she will turn into a speck of light and vanish. Because she loves him unselfishly, she fulfills her duty in collecting the prince's scattered heart shards in the hope that, when Mytho's heart is returned, he would find happiness and she would see his true smile again. Towards the end of the series, Duck is happy for Mytho and Rue's relationship, and appears to have developed a strong relationship with Fakir. In the manga, Duck's name is Ahiru Arima and this name is retained in the English adaptation of the manga.

Voiced by: Nanae Katou (Japanese), Luci Christian (English)