Though she was only on for a kind of small chunk of the show, I was impressed by Jamie Chung’s incarnation of Mulan. Though most of her story in Once Upon a Time has nothing to do with the famous legend or Disney film.
She is an ally of Prince Phillip, and with her help they awaken Princess Aurora from a sleeping curse. Then they meet Emma Swan and Snow White, and fight a mini-war of sorts with Regina’s mother Cora.
Though it becomes obvious later on that Mulan started to see Princess Aurora as “more than a friend” but Aurora had no idea.
So she later leaves her beloved princess and joins Robin Hood’s crew.
She later appears out of the blue and when ABC announced there would be a LGBT romance. Everyone was thinking it’d be her. And… it was Ruby and Dorothy Gale.
For which Mulan, Snow White, and other friends sees the two rejoice when they found each other.