Fakir Enemies

Original author of "The Prince and The Raven" and the spirit responsible for manipulating the real world with it.

She begins by being in a relationship with Mytho, but as her relationship becomes threatened she transforms into Princess Kraehe in order to thwart Princess Tutu.

Yes, it's the monster-sized raven created by Drosselmeyer that shattered Myutho's heart in the "story". He has the abillity to eat people's "hearts".