is a member of the humanoid race called Kree, he was known as the "White Kree" because of his earthly skin, which he gained from Kree's intercourse with other humanoids on other worlds to advance evolutionary and genetic development (which, incidentally, gave rise to the "Inhumans" race). "-" No People "led by Black Bolt, because humans have the genetic potential to develop superhuman abilities), yet Kree was highly respected and rich among others. After Kree's first encounter with Earthlings, Mar-Vell was sent to Earth to determine if Earthlings were a threat and to analyze their technology. The people of Mar-Vella often called the name "Captain Marvel" because it sounded similar. However, his work was complicated by his jealous colleague Yon-Rogg, who despised Mar-Vell because of his reputation and his relationship with the nurse Una. Yon-Rogg "accidentally" fired lasers at his ship at Mar-Vell, but they hit a small private plane, which Mar-Vell rescued. Unfortunately, the only person inside the plane and his pilot, Dr. Walter Lawson, died, so Mar-Vell took over his identity because he was alike with him to infiltrate a military base at Cape Canaveral, Florida.
As Lawson, he met Mar-Vell Carol Danvers, who was the base's chief of security, and they got closer, even though she suspected "Lawson" of being a traitor because of his suspicious behavior. General Bridges, who led the base, showed "Lawson" the Krees reconnaissance robot "Sentry 459", which was defeated by the Fantastic Four and then confiscated by the army. Yon-Rogg used the robot to kill Mar-Vella and activate it remotely from his ship. Mar-Vell put on his costume to defeat "Sentry" and save Carol, and then became known as "Captain Marvel." Yon-Rogg and other Kree, Zarek and Ronan, who also hated Mar-Vella, realized the "Supreme Intelligence" - Kree's head and accused Mar-Vella of treason for destroying the robot and collaborating with the Earthlings (who often turned out their harm). He warned Yon-Rogg not to jeopardize the mission for personal revenge. America and the Avengers) then exchanged places with him to save him, as the Intelligence formed a telepathic bond between them without their knowledge and they could also exchange places again.
In time, he fought Yon-Rogg when he kidnapped Carol, eventually Yon-Rogg was killed by an explosion of the Krees Psyche-Magnitron device (capable of changing reality but also emitting radiation deadly to humans) and he also gave Carol her abilities that made her later Ms. Marvel. With the help of the Fantastic Four, he later rescued Rick from the Negative Zone and returned to Earth.
Mar-Vell continued to protect the Earth, but also had to face Thanos.
Captain Marvel, Carol, and siblings Quicksilver and Scarlet Witch were later abducted by Skrully, but Scarlet Witch and Quicksilver were released in exchange for Mar-Vell helping to set up the Omni-Wave Transmitter they wanted to destroy Kree. Mar-Vell agreed in disguise, but instead created a weapon, he created a holographic projector and, together with his friends and the Avengers, confronted the Skrulls, but during his captivity he fell in love with Skrill's Princess Annelle, with whom he married Dorrek VII's son Hulkling. He was transported to Earth after birth and lived there in secret with Princess Annelle's faithful maid.
Unfortunately, during his heroic expeditions, he inhaled a deadly nerve gas that caused him cancer and died. Later, the DNA of Mar-Vell and a member of the Eternal race named Elysius, created with the help of genetic engineering Genis-Vell and Phyla-Vell. Genis took over the inheritance of his "father" and became the new Captain Marvel.
Thanos revived Mar-Vella thanks to one of the Gems of Infinity - the Gem of Reality - to discuss with him Thanos' ability to capture the Lady of Death.
During "Chaos War", Captain Marvel was one of the revived heroes and helped the Avengers protect civilians from demons, but unfortunately Grim Reaper killed him.
In the event "Avengers vs. X-Men ", when the X-Men wanted to use the Phoenix Force to rebuild the mutant race and the Avengers wanted to stop him because they considered him dangerous, the Kree mystics revived Mar-Vella to protect Kree with a fragment of the M'Kraan Shi'ar crystal to protect Kree before the Phoenix. Mar-Vell and Kree were brainwashed that they thought the Phoenix would bring them salvation, Vision fortunately Mar-Vella and most of Kree got out of the trance, but not before the Phoenix came for Mar-Vell because of his strength. So Mar-Vell sacrificed himself to save them all, and Captain Marvel's legacy was taken over by Carol.
