Haku (Spirited Away)

Haku is the deuteragonist of the 2002 film, Spirited Away. He is actually a dragon (but doesn't speak in that form), who disguises as a human boy (in which, on the other hand, he does speak).

He had become Yubaba's apprentice to steal her magic, and he also stole that of her twin sister Zeniba.

In the original Japanese version, he was voiced by Miyu Irino, while in the English version, he was voiced by Jason Marsden.

Personality
He is kind-hearted, but is the apprentice of the bath house's ruler, Yubaba. He has known  Chihiro  since she was little. In fact, what eventually proves it was a memory she has in her childhood was that when she falls into a river and loses a little pink shoe, and the river, known as the "Kohaku River", carries her to shore. She then decides that his real name is "Kohaku River", which meant he was the river spirit.