Real Name: Unrevealed

Identity/Class: Sub-species of humanity (Inhuman) mutate

Occupation: Criminal;
    former guardsman

Group Membership: Maximus' "Evil Inhumans" (Aireo, Falcona, Makus, Nebulo, Stallior, Timberius)

Affiliations: Avius, Maximus the Mad

Enemies: Blastaar, Fantastic Four (Ant-Man/Scott Lang, Crystal/Crystalia Amaquelin, Doctor Doom/Kristoff Vernard, Human Torch/Johnny Storm, Invisible Woman/Sue Richards, Mister Fantastic/Reed Richards, Thing/Ben Grimm), Hulk (Bruce Banner), Inhumans (Ahura, Black Bolt/Blackagar Boltagon, Gorgon, Karnak, Lockjaw, Medusa/Medusalith Boltagon, Oracle, Triton), Kree, Kree Kaptroids, Quicksilver (Pietro Maximoff), Franklin Richards, Ronan the Accuser, Silver Surfer (Norrin Radd), Zarrko the Tomorrow Man (Artur Zarrko of Earth-6297)

Known Relatives: None

Aliases: The Lion-Man, Lionus

Base of Operations: Attilan

First Appearance: Incredible Hulk II Annual#1 (October, 1968)

Powers/Abilities: After passing through Terrigenesis shortly after birth, Leonus developed lion-like features and abilities, including super-strength and enhanced endurance, agility and speed. With orange-hued skin and hair and beard that resembled a mane, Leonus possesses a savage nature.

For many years, he wore sharp metal claws on his hands and feet but more recently he seemed to have grown his own thick sharp claws and the fingers on his hands changed from four to three (see comments).

Height: 6'4"
Weight: 230 lbs.
Eyes: Brown
Hair: Blonde

History: (Official Handbook of the Marvel Universe: Deluxe Edition I#6 (fb) – BTS) – After passing through Terrigenesis shortly after birth, the man who would become Leonus took on lion-like features and traits, and developed super-strength and enhanced endurance, agility and speed, as well as sharp claws. He began wearing enhanced metal claws on his hands and feet. He eventually became a guardsman but he believed that Maximus should be in power and he turned into a renegade to support Maximus.

(Incredible Hulk II Annual#1 (fb) – BTS) – A group of Inhumans gathered together, seeking to overthrow Black Bolt as the ruler of Attilan, wanting to take over the city themselves. The group included Leonus the Lion-Man, as well as Falcona, Aireo, Timberius, Nebulo and Stallior. The group attacked the city but they were defeated.

(Incredible Hulk Special I#1) – Leonus and his allies were put on trial, presided over by Black Bolt and the Oracle. When Stallior tried to turn on the others for his own gain, he was attacked by his allies, with Leonus out for blood. Black Bolt stopped the fight and, ignoring the cries of Maximus the Mad that Black Bolt should be the one on trial, the king found the six guilty and sentenced them to imprisonment in the Un-Place, in another dimension behind an impenetrable shield. The group was shocked when Lockjaw later teleported the Hulk into the Un-Place as well. Hulk, refusing all offers of alliance from the imprisoned Inhumans, began smashing at the barrier and, after several blows, smashed it, freeing the Inhumans along with him. Maximus the Mad teleported to the Un-Place and teleported the group back to Attilan, where he unleashed Hulk on the city while he took the others into his secret lab. After taking them through the lab, Maximus told them of the ancient scientist Romnar, who had left behind a deadly weapon that was behind a strong barrier. Maximus hoped the Hulk could break through it and that he could use the weapon to take over Attilan. Hulk (lured there by Maximus) agreed to be friends with the Inhumans and he smashed the barrier, releasing Romnar's substance, which Maximus then weaponized. Maximus demanded control over the entire city and the Inhumans realized he was mad with power, causing Leonus and the others to turn against him. When Hulk attacked the Inhumans, Leonus and his allies turned on him, hoping to win the favor of the city so they could seize control of it themselves. Stallior led a charge against him, wrapping the Hulk in chains, then Leonus slashed at Hulk with his claws as Timberius pounded on him but Hulk easily tossed all three aside. As Black Bolt defeated Maximus, Nebulo seized Romnar's weapon. Black Bolt soon defeated Hulk and Maximus and got control of Nebulo's weapon.  

(Fantastic Four I#83 (fb) – BTS) – Maximus seized control of the crown, imprisoning the Royal Family (Black Bolt, Triton, Karnak, Gorgon) while using science and hypnosis to keep control of Medusa and Lockjaw. Maximus managed to capture the Fantastic Four (Crystal, Human Torch, Mr. Fantastic, Thing) as well then made plans to conquer the world. Aireo, Stallior, Leonus, Falcona and Timberius worked for him.

(Fantastic Four I#83) – Maximus had Stallior and the others attend to him in the baths then he forced them to bow after they dressed him for the day. Maximus prepared to activate the Hypno-Ray that would help him attack the human world but the Royal Family and Fantastic Four escaped and destroyed it. Maximus fled with Leonus and his allies then they boarded a ship into space to find freedom.

(Incredible Hulk II#119 (fb) – BTS) – Maximus took Leonus and the others back to Earth, where Nebulo rejoined the team. Maximus hypnotized the civilians of Costa Salvador, making them mindless slaves while he took over ruling the land. He planned to expand his power outward.

(Incredible Hulk II#119) – When the Hulk attacked, Leonus and the others fought back, with Leonus being flung off the Hulk's back. When the American military attacked, Maximus invited Hulk to join them.

(Incredible Hulk II#120) – While the Hulk held off the military, the Inhumans fought amongst themselves about whether they should turn on the Hulk. Maximus was prepared to kill those in the military so Hulk fought back and Maximus unleashed a giant robot he'd developed. Hulk destroyed the robot and Maximus fled in a rocket with Leonus and the Inhumans.

(Amazing Adventures II#1) – Likely mentally manipulated by Maximus, Leonus and his allies served him and placated to Maximus while he launched missiles on Attilan. 

(Amazing Adventures II#2) – Maximus manipulated the Royal Family into fighting the Fantastic Four as Aireo, Leonus, Stallior and Timberius tended to him. Soon, Maximus was captured by the Royal Family, who defeated him and stopped the missiles.

(Silver Surfer I#18 (fb) – BTS) – Maximus and his followers (including Leonus) were exiled from the city and forced to live on their own while Black Bolt controlled the Great Refuge.

(Silver Surfer I#18) – When Silver Surfer got close to Attilan, Maximus sent Aireo, Leonus, Stallior and Timberius against him. Stallior knocked Surfer into Leonus' grip and Leonus, now with iron claws on his feet as well, leaped at Surfer, but the board knocked Leonus to the side. Silver Surfer sent the Inhumans scrambling back to Attilan, where Maximus hoped to turn Surfer against Black Bolt. After Surfer fought the Royal Family, Maximus and his allies attacked Attilan in their air-ship, firing electron bolts on the palace, but the ship was soon repelled by the Royal Family.

(Inhumans I#1) – Leonus, operating a hover platform, discovered a wounded Avius outside the city. Avius told him that Blastaar had attacked and was headed into Attilan. They rushed into the Throne Room to give warning, finding Medusa, Karnak and Gorgon there. They warned them about Blastaar but Gorgon wondered if the two were still serving Maximus. Just then, Blastaar attacked.

(Inhumans I#2) – Blastaar defeated Gorgon, Karnak and Medusa then attacked Leonus and Avius anew. Later, they were among the crowd that saw the fall of the Kree Kaptroids then they saw Iridia emerge from an Inhuman cocoon, beautiful and with butterfly wings.

(Inhumans I#5 (fb)) – Iridia saw a comet fall toward Attilan and she narrowly avoided it but it struck Leonus full in the chest, taking mental control of him. Iridia then watched as Leonus touched Stallior and then Maximus, taking over their minds as well. Maximus sought to control Attilan again and captured Quicksilver and Crystal, promising to fire a cannon at them if the populace did not surrender.

(Inhumans I#4) – When the Royal Family returned to Attilan, Falcona, Leonus, Makus and Aireo stood with Maximus as he welcomed Black Bolt and the others home after they shot Iridia out of the air.

(Inhumans I#5) – Leonus and Stallior were chaining up Black Bolt, Medusa and Gorgon when Maximus saw Lockjaw escaping with Karnak and Triton. Maximus threatened to kill Leonus if one more Inhuman escaped. Leonus watched as Black Bolt was chained to the ceiling, where the ruler stayed for nine straight days.

(Inhumans I#6) – After escaping and destroying part of Attilan with his voice, Black Bolt, through Medusa, gave a speech about taking the Inhumans into space as Maximus and the mind-controlled Inhumans, including Leonus, prepared to fire a cannon on the Royal Family but they were swiftly defeated.

(Marvel Fanfare I#14/2) – When Quicksilver was accused of stealing the Royal Scepter, Leonus joined Gorgon and others in confronting the hero, who swore he was innocent. Quicksilver later exposed Aireo as the thief.

(Fantastic Four Unlimited I#2 (fb) – BTS) – The Genetic High Council recruited a team of Inhumans to find the boy Ahura on Earth. Seeker (Uys) assembled Leonus, Timberius, Falcona, Pinius and others to head to Earth.

(Fantastic Four Unlimited I#2) – Seeker led his Inhumans to find Ahura but they confused the boy Franklin Richards for Ahura and attacked the Fantastic Four (Human Torch, Invisible Woman, Mr. Fantastic, Thing). Realizing they had the wrong boy, Seeker ordered the team back to Attilan but he soon used tracking equipment and found Ahura with the exiled Royal Family. A battle broke out and the Fantastic Four got involved once more. Back in Attilan, the Genetic High Council was exposed for trying to take Ahura's power and Leonus and Timberius briefly took the side of the Council, saying they followed those who were in power, but the Council was defeated along with Maximus, who was revealed as being behind the events.

(Fantastic Four: Atlantis Rising#1) – When Attilan was threatened on the moon, the city began collapsing and the Genetics Council abandoned the populace. Feeling like they had no choice, Leonus and Timberius realized they had to awaken Maximus the Mad to save the civilians. The Fantastic Four arrived with Dr. Doom (Kristoff Vernard) and shrank Attilan down so they could save the city and return it to Earth. There, Maximus, Leonus, Timberius, Nebulo and Stallior were enlarged to talk to the Fantastic Four but they ended up attacking the heroes.

(Fantastic Four I#401) – Leonus searched the Fantastic Four's ship and found Boris (secretly Earth-6297's Zarrko) hiding in the shadows and he reported back to Maximus, who had imprisoned the Human Torch. With Leonus, Stallior, Timberius and Nebulo flanking him, Maximus ordered the Inhuman ship to go on to Atlantis (which had risen to the surface), where they could claim their land. The Inhumans soon saw the diminutive Fantastic Four (Ant-Man/Scott Lang, Dr. Doom/Kristoff Vernard, Invisible Woman, Thing) escape the shrunken Attilan. The Invisible Woman temporarily blinded Leonus with invisible shards. When Leonus tried to grab Ant-Man, "Boris" hit Leonus with a concussive blast from behind.

(FF I#11) – Outside the Attilan cell containing Maximus and Diablo, Leonus battled attacking Kree soldiers but he was knocked unconscious by Ronan the Accuser.

Comments: Created by Gary Friedrich, Marie Severin, Syd Shores, Frank Giacoia and John Verpoorten.

It's difficult to know how often Leonus is mentally manipulated by Maximus in, well, almost all of his appearances. He at times appears loyal to the throne and the Royal Family but frequently is opposed to them and fighting against the government. There is evidence that Maximus is manipulating at least some of these times. Not much characterization has been given to this character outside of his alliances to Maximus.

The "League of Evil Inhumans" is never officially called that in the comics but Leonus is most associated with Falcona, Nebulo, Stallior, Aireo and Timberius.

Leonus went through a bit of a transformation in his last appearance in FF #11, his claws being his own. There may have been more Terrigenesis, this could be a natural progression of his abilities or it could be artistic interpretation.

Profile by Chadman.

Leonus should not be confused with:

images: (without ads)
Official Handbook of the Marvel Universe: Deluxe Edition I#6, p27, pan4 (Leonus, main image)
Incredible Hulk II Annual#1, p5, pan2 (versus Stallior)
FF I#11, p7, pan4 (vs Kree)

Incredible Hulk II Annual#1 (October, 1968) – Gary Friedrich (writer), Marie Severin (penciler), Syd Shores, Frank Giacoia, John Verpoorten (inkers), Stan Lee (editor)
Fantastic Four I#83 (February, 1969) – Stan Lee (writer/editor), Jack Kirby (penciler), Joe Sinnott (inker)
Incredible Hulk II#119 (September-October, 1969) – Stan Lee (writer/editor), Herb Trimpe (artist)
Incredible Hulk II#120 (October, 1969) – Stan Lee (writer/editor), Roy Thomas (writer), Herb Trimpe (artist)
Amazing Adventures II#1-2 (August-September, 1970) – Gary Friedrich (writer), John Buscema (penciler), John Buscema (inker), Stan Lee (editor)
Silver Surfer I#18 (September, 1970) – Stan Lee (writer/editor), Jack Kirby (penciler), Herb Trimpe (inker)
Inhumans I#1-2 (October, December, 1975) – Doug Moench (writer), George Perez (penciler), Frank Chiramonte (inker), Len Wein (editor)
Inhumans I#4 (April, 1976) – Doug Moench (writer), George Perez (penciler), Vince Colletta (inker), Marv Wolfman (editor)
Inhumans I#5 (June, 1976) – Doug Moench (writer), Gil Kane (penciler), Vince Colletta (inker), Marv Wolfman (editor)
Inhumans I#6 (August, 1976) – Doug Moench (writer), Gil Kane (penciler), Frank Chiramonte (inker), Marv Wolfman (editor)
Official Handbook of the Marvel Universe: Deluxe Edition II#6 (May, 1986) – Mark Gruenwald (writer/editor), Peter Sanderson (writers), Josef Rubinstein (penciler), Andy Yanchus (inker)
Fantastic Four Unlimited I#2 (June, 1993) – Roy Thomas (writer), Herb Trimpe (penciler), Steve Montano (inker), Mike Rockwitz (editor)
Fantastic Four I#401 (June, 1995) – Tom DeFalco (writer), Paul Ryan (penciler), Danny Bulanadi (inker), Nel Yomtov (editor)
Fantastic Four: Atlantis Rising#1 (June, 1995) – Tom DeFalco, Glenn Herdling (writers), MC Wyman (penciler), Rey Garcia, Don Hudson, Geof Isherwood, Kevin Yates (inkers), Nel Yomtov (editor)
FF I#11 (December, 2011) – Jonathan Hickman (writer), Barry Kitson (penciler), Scott Hanna, Scott Koblish, Jay Leisten, Mark Pennington (inkers), Tom Brevoort (editor)

First Posted: 03/28/2020
Last updated: 03/28/2020

Any Additions/Corrections? please let me know.

Non-Marvel Copyright info
All other characters mentioned or pictured are ™  and © 1941-2099 Marvel Characters, Inc. All Rights Reserved. If you like this stuff, you should check out the real thing!
Please visit The Marvel Official Site at:

Special Thanks to www.g-mart.com for hosting the Appendix, Master List, etc.!

Back to Characters