Adamas is the Greek God of Conquest (征服神, Seifuku-Shin) and was once part of the Thirteen Gods of Olympus, now reduced to twelve.

Adamas is self-centered and violent, to the point of becoming enraged upon learning that his younger brother, Zeus, would be the King of the Universe. To prevent this, he gathered an army of enemies of the Greek Gods such as Titans, Giants, and the monster Typhon.

He is also very quick-tempered, as he attacked his brother Poseidon without hesitation when he insulted him. Despite his shortcomings, however, he is extremely charismatic: before being stopped by Poseidon, Adamas had managed to obtain the support of 49 members of the Gods' Council and, with the help of Hermes, the support and loyalty of some of the Gods of Olympus.

Among his three siblings, Adamas loves his elder brother Hades unconditionally and has unshakable faith in his abilities, to the point that Hades' death at the hands of Qin Shi Huang is enough to make him attempt to kill the Chinese Emperor after the fight is over. When he finds Brunhilde and Göll and sees that they are not willing to reveal Qin Shi Huang's whereabouts, he almost kills them before being blocked by Beelzebub, who discourages him from taking revenge by telling him that Hades would never approve of such a thing. This convinces Adamas to stop, but not before promising that he would take his revenge on the Valkyries and Qin Shi Huang as soon as Ragnarok is over.

Adamantine is a very tall humanoid God with an athletic build who also sports spiky red hair messily combed back. He has a unique green skin. He has thick eyebrows, which are usually furrowed, and sharp eyes with the irises colored a hazel brown. His eyes seem to have a bit of eyeliner on them. He has a horizontal black line over his nose, which spreads towards his cheekbones.

As a Cryborg, only Adamantine's face remains while the rest of his body is mechanical. His torso and neck are made up of black wires, while his chest has prominent plates to protect his interior. His arms and hands are made of mechanical material. A thick belt of machinery and technology is wrapped around his waist. His expression is always a scowl. To hide his face, Adamantine dons a mask that resembles a fly in some way, which is also attached to his face— making him able to shift his mask to hide his face whenever he pleases. Lastly, Adamantine wears a large dull blue cloak that resembles a cape with a scarf around his neck.

Overall Ability: Being one of the sons of Kronos and a participant in both the Gigantomachy and potentially the Titanomachy Tournament, it can be assumed that Adamas is an extremely powerful God. As God, Adamas has an unlimited life span and cannot die of old age. He is very ancient, being older than the Big Bang. Furthermore, Adamas possesses physical abilities far superior to those of any ordinary Human being, and his body cannot be harmed by deadly weapons. However, he can be injured and killed by physical attacks with superhuman strength or by Divine Weapons. He also owns a giant warship, which happens to be his residence.

Divine Strength, Durability, and Endurance: As a God, Adamas possesses supernatural strength. He was able to kick an immense table with such force that the table flew off and broke from the impact. Also, after becoming a Cyborg, Adamas was able to easily kill one of Beelzebub's monsters with one hit and destroy a marble pillar by simply pushing and dragging his fingers inside it. Adamas is much stronger than a normal Human, to the point of being able to survive after being impaled by his brother Poseidon and being thrown against a wall with enough force to shatter it, and also being heavily mutilated. Nonetheless, he was fatally injured as a result and had to undergo extensive surgery to recover.

Mechanically Enhanced: After being seriously injured by his brother Poseidon, Adamas was cured by Beelzebub, who had to surgically alter many parts of his body, replacing them with machines. It appears that certain features have been included in Adamas' new body, such as a retractable mask that can hide his true identity. It is possible that Adamas' physical abilities were increased by the intervention of Beelzebub. Since most of his body is made of metal, Adamas lost the ability to feel pain: after Beelzebub cut off his hand, Adamas showed no sign of pain. His pain tolerance is so high that Adamas was more annoyed by Beelzebub's interruption than by his missing limb.

Enhanced Charisma: Despite being a very violent individual, Adamas is very charismatic. Before being nearly killed by his brother Poseidon, he managed to get the support of 49 members of the Gods' Council and, with the help of Hermes, of a certain number of the Gods of Olympus to attempt the coup against Zeus. Adamas has also managed to convince the Giants, the Titans, and the mighty Typhon to join his cause.

Scythe Proficiency: Adamas is proficient with the scythe and can materialize it out of thin air. However, the full extent of his abilities and his weapon's capabilities is unknown. Having been both a likely participant in the Titanomachy Tournament and one of the Gods of Olympus, Adamas likely has many centuries of experience.

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