Ronan is a member of the Kree empire aristocracy, a small group of Kree who can trace their ancestry back to the original Kree tribes on their home planet Hala. After Ronan completes his formal education, he is enrolled in the Kree Public Accuser Corps. Ronan responds well to his training, and is constantly promoted. Finally, in an incident on the Kree border , he stops a fleet of Skrull ships from entering the Kree's airspace. For this, he is made Supreme Accuser of the Kree Empire, responsible for enforcing the laws and decrees of the Supreme Intelligence.
Ronan was created by Stan Lee
and Jack Kirby
and first appeared in Fantastic Four #65
Mayor Story Arcs
Versus the Fantastic Four
Ronan's duties have caused him to encounter many of Earth's heroes. Ronan's first Earth encounter on Earth is with Fantastic Four. When the Fantastic Four take a vacation on the island of T-Vu in the South Pacific, they are attacked by Kree Sentry 459, who was left on the island many thousand years ago. The last instructions of the Sentry was to keep any intruders off the island. When the Fantastic Four destroy the Sentry, the Supreme Intelligence sends them a dream during which they are instructed to await their trial and execution by Ronan. Ronan makes an attack against the Fantastic Four, but he is ultimately defeated.
He was with the Kree when they attacked the Inhumans. He is seen first when Black Bolt and Medusa came upon the ship to see who is attacking. Black Bolt rushes to attack Ronan but is caught in a stasis field. Ronan then tells the fainted Black Bolt that things are going to change. Ronan tells the Inhuman that they belong to the Kree. And they were born to be servants to spread throughout the galaxy. He also tells them that Black Bolt will be second in command. Ronan sends the Inhumans to fight a Shiar ship. Ronan sends Black Bolt, Medusa and Gorgon to a rest stop in the galaxy to kill the master of guilds of the Shiar. Ronan sees how Maximus lead the Alpha Primitives to attack sent him to the Negative Zone. Ronan is challenged by Black Bolt to a duel to win the freedom of the Inhumans. Ronan looses.
During the Annihilation story arc Ronan is accused of treason and must clear his name. Ronan makes his way to the planet of Godthab Omega to find the witness who has testified against him. On this planet he encounters the assassin Gamora and her group of warriors known as the Graces, one of which is the witness in question ( Tana Nile). Although Ronan eventually discovers that it was an individual in the Fiyero House of the Kree who planned his betrayal, Tana Nile dies (a victim of the Annihilation wave) before a specific name can be given to him. By the miniseries end, Ronan sets off for Hala to defend the Kree empire from the approaching Annihilation Wave. He joins the United Front led by Nova his an attempt to defend off the Annihilation Wave.
Later, Ronan returns to Hala with Super-Skrull to dethrone the House Fiyero. After knocking Ravenous unconscious and murdering the House Fiyero, Ronan attempts to locate the Supreme Intelligence, only to find that it was lobotomized by the Fiyero. Killing it in mercy, Ronan exits its chamber to thunderous cheers. Ronan becomes ruler of the Kree Empire.
Ronan was attempting to return the Kree empire to it's former glory in the midst of the return of the Phalanx during the Annihilation Conquest. He failed and was enslaved to the Phalanx for a time as one of their Select. Freed from his servitude by Wraith, Ronan would ally himself with Wraith, Super Skrull, Praxagora, Ra-Venn and even his hated foe Ravenous to repel the Phalanx and once more set to rebuilding the Kree empire.
As of the end of the Secret Invasion: Inhumans miniseries, Ronan has renewed the Kree's ties with the Inhumans by forging an alliance with the Inhumans royal family wherein he assisted them in freeing Black Bolt from Skrull captivity in exchange for being promised Crystal's hand in marriage.
War of Kings
As the Inhumans wanted to get their revenge on the Skrulls, they attacked them and destroyed their fleeing vessels. After their attack on the Skrulls, the Inhumans then invaded the Kree empire and forced Ronan to bow down to Black Bolt. Ronan was set to marry Crystal of the Inhuman Royal Family. As she talked with Polaris about how she is only marrying him to bring the Kree and Inhumans together, Ronan overheard her and was somewhat heart-broken. As they were about to get married, they were attacked the the Shi'ar and the Imperial Guard who were serving under Emperor Vulcan. As Crystal was being attacked, Ronan came to save her but he was double teamed and taken out as well. Thus began the War of Kings.
Ronan was still gravely injured from the attack by the Shi'ar Imperial Guard, but his stubbornness and refusal to die kept him alive. Crystal stayed by his side, watching over him and trying to make him feel better and tell him about them having the upper hand in the war. She confirms to him that their wedding ceremony was completed and they truly are married. Ronan, from all the Kree, saw best of what the Inhuman rule over the Kree could do for his race. Ronan appreciated the help of the Inhumans as he knew that the Kree needed rescuing from genetic stagnancy. Ronan learned of the Uplift Program, designed by the Inhumans, which would further evolve them to make them superior. This Program would not be a success, but during this time feelings being to grow between Ronan and Crystal.
When the threat of universal destruction was eminent during the Thanos Imperative, Ronan was chosen by Nova to be a part of his cosmic heavy hitters to launch a sneak attack on the evil Lord Mar-Vell. But even the two of them with the Silver Surfer, Gladiator, Quasar and Beta Ray Bill were not enough to stop Mar-Vell. After his escape, Ronan and the others fought off the invading forces of the Cancerverse at the Fault.
They all soon learned it was Starlord's wish to have them form a team of the strongest in the universe, the people who could truly guard it. The team was dubbed the Annihilators and their first threat came in the form of the Dire Wraith sorcerer Doctor Dredd.
Ronan, despite being arguably the weakest of the group, showed his value by absorbing the energies of the sorcerer and knocking him out with his Universal Weapon. Dredd would soon be revealed to be a skrull impostor and defeated.
Being of the Kree and in good shape, Ronan has strength, stamina, and speed beyond that of the normal human as well as a faster healing factor. As a public accuser Ronan also has a tactical mind, superior combat skills, increased intelligence, and the ability to adapt to different environments. Ronan can normally lift or press around 10 tons and around 80 tons while in his armor.
Ronan usually wears a suit of cybernetic armor that enhances all of his natural abilities as well as protecting him. His armor contains scanners, a cloaking device, can generate electric charges, and allows the user to freeze targets. It also allows Ronan to fire powerful blasts from his eyes.
Being the Kree Supreme Public Accuser Ronan wields a Universal Weapon. The one that Ronan wields is the most powerful. This weapon allows it's wielder to fire blasts of energy, create force fields, and fly. This weapon also allows Ronan to harness cosmic energy for a variety of effects including matter and energy manipulation.
Ronan also wields a blaster as a sidearm.
Ultimate Ronan (Earth-1610)
Ronan is one of the sons of Thanos. He was Accuser of Empire Endless Resurgence (Aceron Empire). His task was to suppress the rebellion and to stop riots and disturbances. He used the Ultimate Weapon, which gave him much of his powers: super-strength (able to lift more than 50 tons) and endurance. Ultimate Weapon can manage any samples of energy, protect the owner of the physical and energy attacks, allows him to shoot energy beams, to reorient teleportation rays to heal his wounds, is also able to extinguish the flames Human Torch. It is associated with the genetic structure of Ronan, if someone else tries to seize weapons, it will burn caught. Despite the loyalty of the Empire, Ronan primarily devoted to the law. When Thanos had ordered him to kill all men older than 10 years, stopping the uprising on the planet Pyx, Ronan found an excuse to ignore instructions. Instead, he destroyed the Parliament, using bombs painfully executed senators, and the family were sent to Aceron, as slaves. Believing in the power of symbols, he left the ruined buildings and abandoned corpses as a reminder to future generations, impeding further uprisings. Later he returned to the Pyx, hunting for the Fantastic Four, who are in Aceron's space. Foresaw that the fugitives would try to teleport to the Pyx as soon as they can, Ronan has surrounded the ruins of the Senate, and then used the Ultimate Weapon, to capture their signal teleport and pull four in place between the world Pyx and Earth's New York. Informing people that they are charged, he demanded that they obeyed him. Quartet and Seed Nineteen attacked Ron, but it turned out that he is on his forces, while with Ultimate Weapon. Mr. Fantastic ordered both groups to combine their forces to reflect the effect Ultimate Weapon back to Ronan, forcing the Prosecutor to drop it. After which the existing seized weapons and disabled Ronan.
Fantastic Four: World's Greatest Heroes
Ronan creates the Super Skrull and seeks revenge on the Human Torch.
Ronan can be seen appearing in the background with the Wanderers in the Silver Surfer animated series.