Raven Darkholme, also known as Mystique, is a fictional character in the Marvel Comics universe. She is a mutant with the ability to shapeshift, allowing her to change her appearance and mimic the voices of others. First appearing in The X-Men comics, she is often portrayed as an anti-heroine and has been both a member of the X-Men and the Brotherhood of Evil Mutants. Raven is known for her blue skin, yellow eyes, and red hair when in her natural form. Her complex character often explores themes of identity and acceptance, as she struggles with her mutant abilities and societal prejudice against mutants.