Danielle Moonstar, Mirage
First appearance: Marvel Graphic Novel #4: The New Mutants, 1982
History: an American Indian girl from Colorado, she has the ability to create illusions that could be based on her opponents' fears or wishes. She even acquired magical powers after an adventure in Asgard. She is of Cheyenne background, and was a leading member of the New Mutants and X-Force for many years.
Current status: unclear.
Was subjected to the following acts of discrimination: during House of M, she was among many mutants who lost their powers. And Emma Frost threw her out of the Xavier school because she thought that without powers, she didn't belong.
What's wrong with how this was done? It's pretty obvious by now that House of M was not worth the paper it was printed on. But the story in New X-Men #22 in 2006 where Frost gave her an eviction notice only adds insult to injury. When Storm lost her powers for almost 2 years back in the 1980s, Prof. Xavier didn't tell her to scram, and recognized that even without superpowers, she could still be quite effective. What was done 4 years ago with Moonstar and Frost is just one more stupid example of writing that makes the latter look like a cad, which is not a good idea even for an anti-heroine.
And what's really sad is that one of the best characters who graduated from the New Mutants years ago has now been reduced to a state of mediocrity.