Martinex T'Naga is a fictional character, a superhero from an alternate future version of Marvel Comics' shared universe, the Marvel Universe. Most of Martinex's adventures take place as a member of the 31st century Guardians of the Galaxy.
He grew up to become a scientist and technician. Like the other Pluvians, Martinex's body was completely covered by facets that were crystalline in appearance. This design was so that the Pluvians could withstand the extreme temperatures of their world. Martinex could also emit heat and cold from his hands. Martinex became the last surviving Pluvian after the Badoon exterminated all the other Pluvians. Martinex escaped the Badoon and teamed with Vance Astro, a human astronaut from the 20th century, Charlie-27, a Jovian, and Yondu, from Alpha Centauri, to fight the Badoon as the freedom fighters, the Guardians of the Galaxy.
The Guardians later teamed with the time-traveling Thing, Captain America, and Sharon Carter to retake New York City from Badoon forces. Martinex and the Guardians then time-traveled to the 20th Century and met the Defenders. They returned to the future with Starhawk and the Defenders and defeated the Badoon.
Eventually, the Guardians drove the Badoon from Earth's solar system and Martinex later became the team's reluctant leader for a time. The Guardians departed post-war Earth on a space mission, and met Nikki who joined the Guardians of the Galaxy, and they visited the Asylum planet. The Guardians then teamed with a time-traveling Thor, and battled Korvac and his Minions of Menace. Martinex and the Guardians traveled to the present era, and assisted the Avengers in battle against Korvac.
While looking for the shield of Captain America, the Guardians came into conflict with Taserface and the Stark. They also encountered Firelord and defeated the Stark. The Guardians then battled a team of superhumans known as Force, and Martinex was mortally injured by the member of Force known as Brawl. Much of the crystals that covered Martinex's body were shattered, but Martinex recovered with the help of fellow Guardian Starhawk. All of the exterior crystals on Martinex fell away, leaving Martinex with a new crystalline appearance, one that was less faceted, and somewhat purple in tone. The Guardians then located Haven, a lost colony of Earth founded by mutants, where they battled Rancor and her lieutenants. Martinex later met the Spirit of Vengeance.
Eventually, Martinex left the team to form a larger version of the Guardians, known as the Galactic Guardians. The Galactic Guardians were initially made up of alternate future versions of Wonder Man, Firelord, the Vision, Phoenix, and Ghost Rider. Martinex would later return to the Guardians of the Galaxy. The adventures of Martinex and his fellow Guardians after the end of their 1990s self-titled series have yet to be revealed.
Martinex has earned doctorates in physics and engineering. He possesses expertise in various areas of 31st Century technology, including computers and cyborg design.