Angelica Mandy Gabrielle Delacour When Harry gets entered into the Triwizard Tournament, he is forced to face a serious of daunting tasks.
Her special moment is in Deathly Hallows when she helps Harry with some crucial information.
The thing is, she has a pretty strict demeanor on the surface, but when you consider the fact that she was a Gryffindor Quidditch legend when she went to Hogwarts as a high schooler, you begin to understand how cool she really is.