Sunspot (Roberto "Bobby" da Costa) is a fictional superhero appearing in American comic books published by Marvel Comics. The character is most commonly associated with X-Men-related groups the New Mutants and X-Force. A mutant from Brazil, Sunspot possesses the ability to absorb and channel solar power. He is idealistic and impulsive, but is considered a close friend of many of his teammates. He was an important member of the X-Men's 1980's-era junior team and its reincarnation X-Force. He later retired his career as Sunspot and garnered a massive fortune, allowing him to buy out the organization Advanced Idea Mechanics, rebranding it Avengers Idea Mechanics, which he operates under the codename Citizen V.