An ancient Alpha Titan standing at the pinnacle of the Monsterverse, he is approximately 120 meters tall and weighs 100,000 tons. He is characterized by thick reptilian skin and sharp dorsal fins. His personality is that of a cold guardian and mediator of Earth's ecosystem; he mercilessly eliminates threats that break the balance of nature but rarely shows hostility first. His primary abilities include firing Atomic Breath to kill enemies or transforming into his Burning version to unleash devastating radioactive pulses. Age: 250 million years Gender: Male

The King of Skull Island, standing 102 meters tall and weighing over 80,000 tons. He possesses intelligent reasoning and can communicate with humans. In battle, he uses his superior agility and an ancient axe capable of absorbing Godzilla's energy, utilizing the terrain to overpower enemies larger than himself. Age: 430 years Gender: Male Maintains a rivalry with Skar King.

Standing 158m tall and weighing 141,000 tons. A cruel and evil space monster with three heads. The middle head cunningly commands the whole, enjoying the destruction and terraforming of Earth's ecosystem. He is a living natural disaster, breathing powerful Gravity Beams from his three mouths and manipulating storms. Age: Over 500 million years Gender: Male

Wingspan: 244m, Weight: Approx. 2,700 tons. The benevolent and kind Queen of the Monsters who protects Earth's ecosystem. She seeks to protect humanity and maintains a deep symbiotic relationship with Godzilla, acting as a saint-like figure who provides support during crises. She blinds enemies with mystical light and assists allies with sharp stingers and silk. Age: Tens of thousands of years (reincarnating life cycle, effectively infinite) Gender: Female. Speaks politely to others.

Standing 162m tall and weighing 150,000 tons. An ultra-massive Kaiju that once brought the Ice Age to Earth. Despite her overwhelming destructive power, her nature is gentle; she dislikes fighting and prefers quiet places. She is an incredibly powerful living weapon capable of breathing Frost Bite Blast that freezes everything. Age: Over 500 million years Gender: Female

Wingspan: 265m, Weight: 39,000 tons. A fiery and arrogant Kaiju awakened from volcanic magma. He is also cunning and opportunistic, showing absolute submission to those stronger than him. He is a terrifying pterosaur who dominates the skies with powerful shockwaves generated during supersonic flight and the sulfuric heat of his body. Age: Over 30 million years Gender: Male

Female stands 91m tall and weighs 60,000 tons. An ancient organism that feeds on radiation. They possess an independent and instinctive nature, obsessed only with reproduction and the preservation of their species. They operate in male-female pairs and use powerful EMP abilities to completely paralyze nearby electronics and interfere with Godzilla's breath charging. Age: Over 50 million years Gender: Both male and female exist; they primarily live in packs.

Standing 122m tall and weighing approx. 100,000–200,000 tons. A cyborg built by humanity but possessed and driven wild by the will of King Ghidorah. It has a cruel and ruthless AI personality that hates all living things. It moves without sorrow or mercy solely to slaughter Titans, fighting on par with Godzilla using powerful jet-assisted martial arts and a red Proton Scream. Age: 2–3 years (as a machine) Gender: Robot

Standing 96m tall and weighing 50,000–60,000 tons. A mean and cruel tyrant who has led a troop of apes deep within the Hollow Earth. He is a cunning and devious character who enjoys strategy and martial arts over frontal power struggles. He wields a whip made from a giant monster's spine and harbors ambitions to invade the surface by oppressing and controlling Shimo. Age: Over 100,000 years Gender: Male Note: Surprisingly weak compared to his reputation.

Length: 258m, Weight: Approx. 50,000–60,000 tons. A sea dragon-shaped Titan that rules the deep sea. She is extremely sensitive about her territory and possesses a highly aggressive and hot-tempered personality, attacking any intruder. She moves at overwhelming speeds underwater to coil around and constrict opponents, using a black acidic toxin that melts vision and blade-like fins to slice enemies. Age: Over 250 million years Gender: Female