あひる ありま , Princess Tutu, Duck
Ahiru which translates to duck in Japanese is in all reality a duck herself however in the beginning of the series she was turned into a human girl by Drosselmeyer. He also bestowed upon her a pendent which causes Ahiru to transform into her otherself Princess Tutu. This was all caused by her desire to see Mytho the Prince of the story smile. It turns out her role as Princess Tutu is to gather Mythos missing heart so he can gain back the many feelings of sadness and happiness. It is apparent from the start that Ahiru as a human duck and princess is feverishly in love with the Prince. Regardless if she confesses her feelings to him she will vanish or so the story goes. As such she is stuck in this awful predicament but she always willingly goes to fetch Mythos heart to aid her beloved lifeless Prince. In the manga: Ahiru Arima is human girl that was given a pendant to transform into Princess Tutu. As told by Edel she gather shards for the Prince to help restore his heart.