Rogue's real name is Marie D'Ancanto and she is from the American south, maybe Missisipi. She is a mutant with the ability to absorb the memories and abilities of others, including superhuman abilities. This transference renders the subject unconscious, and is usually temporary.
Rogue was raised by Mystique, and was a member of her Brotherhood of Evil Mutants early on. During this time she encountered Ms. Marvel and through prolonged contact absorbed her powers and memories permanently. As a result, Rogue has super-strength, is nearly invulnerable, and can fly.
Not long after, Rogue learned that her powers were uncontrollable: Any skin-to-skin contact would cause her power to trigger, whether she wanted it to or not. Desperate, she turned to Professor Charles Xavier and the X-Men (X-Men #172), and Xavier's charity towards all mutants led her to join the team. Although her initial months with the team were rough, she eventually became a trusted member of the team.
She was voiced by Meghan Black in the X-Men: Evolution animated television series.