There can’t really be much said about Mulan’s character yet–we’ve only seen her for a bit. But we know that she is strong, a warrior, and very loyal. 😎 She cared deeply for Philip enough to follow him to rescue his True Love, even when she was already in love with him. She was willing to sacrifice her life for Philip and Aurora to have their happiness, even when it meant that her soul would be sucked away by a Wraith.
And after Philip is gone, she seems still willing to look after Aurora, being very protective of her. 🙂 She is wary and not easily trusting, given her treatment of Snow White and Emma. But there is probably much that she went through–she seems very hardened. She sort of reminds me (a little) of Emma in the beginning of the series.