Read more about Nikki at: Wikipedia

Official Site: Marvel

Nicholette "Nikki" Gold is a fictional character, a woman in the Earth-691 timeline of the fictional Marvel Universe, genetically engineered to live on the planet Mercury. As such, she has a superhuman ability to withstand heat and ultraviolet radiation, and can see clearly in very bright light. She is bald, although she expels body heat through her head in a low-temperature flame resembling hair in shape. She was the sixth member of the Guardians of the Galaxy, and is noted for her acrobatic and sharp-shooting skill.

Nikki first appeared in Marvel Presents #4, and was created by Steve Gerber (who did not call her Nicholette Gold). She was first referred to in FOOM #12.

Nicholette "Nikki" Gold was born on the planet Mercury in the 31st Century. She was rescued from an abandoned spacecraft by the Guardians of the Galaxy. She joined the Guardians, seeking excitement and adventure after years of solitude aboard the abandoned spacecraft. She later joined with Vance Astro in a metaphysical union in a successful attempt to use the force of human love to destroy the Topographical Man. The sexual nature of this union embarrassed Vance, but not Nikki.

Nikki traveled to the present with the other Guardians, and assisted the Avengers in battle against Korvac. She traveled to the present again, and battled Hammer and Anvil alongside Spider-Man.

Nikki has not been a contender in any CBUB matches.