Captain Marvel

Mar-Vell was a white-skinned minority of the blue-skinned Kree empire, but despite discrimination and prejudice, Mar-Vell became a renowned soldier and an acclaimed hero for his victories in battle against the Kree's enemies, notably the Skrulls.

Mar-Vell’s regiment, under the command of  Yon-Rogg, was given a mission to observe Earth, specifically human’s progress of space travel. Yon-Rogg, jealous of the love between Mar-Vell and the ship’s medic, Una, ordered Mar-Vell to infiltrate Cape Canaveral, Florida, alone. He then secretly tried to fire on Mar-Vell’s ship, but killed a human instead-- Dr. Walter Lawson. Mar-Vell took advantage of resembling Lawson to pose as the doctor and create a secret identity, but Yon-Rogg again secretly tried to kill Mar-Vell by activating the Kree robot, the Sentry. In his Kree uniform, Mar-Vell publicly defeated the robot, and the onlookers acclaimed him as "Captain Marvel," misinterpreting what the Sentry called him.

Mar-Vell continued to observe humanity, in both his secret and costumed identity, growing increasingly sympathetic for Earth and its inhabitants. His initial adventures were typically extensions of Yon-Rogg’s attempts to kill, discredit, or otherwise destroy him, such as the time Yon-Rogg manipulated Ronan the Accuser to fight Mar-Vell by framing Captain Marvel as a traitor. Mar-Vell also had to navigate the romantic triangle between him and Una and the aggressive attention of his co-worker at the air base, Carol Danvers. These situations came to a head when Una overheard one of Yon-Rogg’s plans to kill Mar-Vell, and she was captured by his agents when she tried to warn him. Although Mar-Vell’s execution failed with the arrival of the Aakon aliens, she was shot in the battle and died in Mar-Vell’s arms as he tried to rescue her.

Before Mar-Vell returned to confront Yon-Rogg, he encountered a powerful being named Zo that granted him increased abilities. Around the same time, he ran afoul of Commander Zarek, who hoped to set up Mar-Vell as a traitor. It was he and Ronan that created the illusion of Zo, with which they again manipulated Captain Marvel into thinking he must destroy his home planet Kree-Lar. Marvel was made temporarily a fugitive until Zarek and Ronan were uncovered by the Kree’s Supreme Intelligence. The Supreme Intelligence then revealed to Captain Marvel that it knew of Zarek and Ronan’s treachery the entire time and orchestrated events so that Mar-Vell would be involved in their plot as the Intelligence hoped to use Mar-Vell for even greater things. Claiming Captain Marvel had “passed” these tests, he clothed Mar-Vell in a new costume and allowed him to retain some of his new-found abilities.

However, as soon as Captain Marvel left to return to Earth, he instead found himself in the extradimensional realm known as the Negative Zone. The Supreme Intelligence then mentally lured the Earth youth Rick Jones to an abandoned Kree base on Earth in order to bid him to wear the "Nega-Bands." By slamming the bands together, Jones and Captain Marvel shared a telepathic link as well as, more importantly, switch places between Earth’s universe and the Negative Zone. In no time at all, Captain Marvel was called out by Yon-Rogg, who was holding Carol Danvers as a hostage. In a last-ditch effort to destroy his rival, Yon-Rogg battled the hero, but Captain Marvel rescued Carol and Yon-Rogg was killed in an explosion as they escaped. (The exposure to Yon-Rogg’s weapon, the Psyche-Magnetron, transformed Carol into Ms. Marvel.)