Mystique is one of the non-playable characters in LEGO Dimensions 2: The Rise of Enoch, from the Marvel Comics franchise.
Raven Darkhölme AKA Mystique is a mutant who was born with blue skin, yellow eyes and shapeshifting powers at some point during the 19th century. Due to her appearance and powers, Raven was the victim of oppression and marginalization which forced her to use her powers to go into hiding from a young age. This forced Raven to grow up to have an "eat or be eaten" mentality that turned her into a super-villain who used her powers ambivalently for self-profit despite still retaining much of her morality.
During the Early 20th century Mystique was girlfriends with the mutant Irene Adler AKA Destiny whom would go on to become a member of Magneto's Brotherhood of Mutants, creating an allegiance between her and the mutant extremist as the two often shared motives. Mystique also once had an affair with the mutant villain Azazel with whom she had a son that she was forced to abandon and who would grow up to be the hero Nightcrawler.
Mystique and Destiny also became the adoptive mothers of a young orphan named Anna Marie who would grow up to be Rogue as Destiny knew would grow up to be important. Mystique was a very protective mother of Rogue who raised the girl to trust no-one but her mothers as they knew how harsh the world was to mutants. After Destiny had a prophecy that Captain Marvel would pose a threat to Rogue in the future, Mystique started spying on her and made Rogue steal Marvel's powers. Rogue accidentally absorbed too much of Captain Marvel however and along with permanently gaining her powers, absorbed parts of her psyche which lead Rogue to defect to the X-Men for treatment.