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 arbiter of Earth's ecosystem; he mercilessly eliminates threats that disrupt the balance of nature, but rarely shows hostility otherwise. 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 Status: The strongest Titan

The King of Skull Island, standing 102 meters tall and weighing over 80,000 tons. He possesses high intelligence capable of communicating with humans. In battle, he uses his superior agility and an ancient axe that absorbs Godzilla's energy to overcome enemies larger than himself. Age: 430 years Gender: Male Status: Rival to Skar King and Godzilla, though sometimes partners with Godzilla.

Standing 158 meters tall and weighing 141,000 tons. A cruel and evil three-headed extraterrestrial Kaiju. The middle head intelligently commands the others, and he enjoys destroying and terraforming Earth's ecosystem. He is a living natural disaster, firing powerful Gravity Beams from his three mouths and manipulating massive storms. Age: Over 500 million years Gender: Male Status: Godzilla's arch-nemesis

Wingspan: 244 meters, Weight: Approx. 2,700 tons. The benevolent 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 ally who assists him in times of crisis. She uses mystical light to blind enemies and supports allies with sharp stingers and silk. Age: Tens of thousands of years (reincarnating life cycle, effectively eternal) Gender: Female (Speaks politely to others) Status: Godzilla's ultimate partner

Height: 112 meters (quadrupedal) / 162 meters (bipedal), Weight: 180,000 tons. An ultra-massive Kaiju who once brought about the Ice Age on Earth. Despite her overwhelming destructive power, she is naturally docile, 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 Status: An incredibly powerful, world-ending Titan

Wingspan: 265 meters, Weight: 39,000 tons. A fiery and arrogant Kaiju awakened from within 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 radiating from his body. Age: Over 30 million years Gender: Male Status: A sly and cowardly Titan

Female: 91 meters tall, 60,000 tons. Ancient creatures that feed on radiation. They possess independent and instinctive personalities, obsessed solely with reproduction and the preservation of their species. They usually operate in male-female pairs or swarms, using powerful EMP abilities to completely paralyze electronics and disrupt Godzilla's ability to charge his breath. Age: Over 50 million years Gender: Both male and female (usually live in packs)

Height: 122 meters, Weight: Approx. 100,000–200,000 tons. A cyborg created by humans but possessed by the consciousness of King Ghidorah. It has a cruel and ruthless AI personality that hates all living things. It moves solely to slaughter Titans without sorrow or mercy, fighting on par with Godzilla using powerful jet-assisted martial arts and a red Proton Scream. Age: 2–3 years (since construction) Status: Robot

Height: 96 meters, Weight: 50,000–60,000 tons. A mean and cruel tyrant who leads a tribe of great apes deep within the Hollow Earth. He is cunning and clever, preferring strategy and martial arts over frontal tests of strength. 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 Status: The arrogant king of the apes (surprisingly weak individually)

Length: 258 meters, Weight: Approx. 50,000–60,000 tons. A sea dragon Titan that rules the deep ocean. 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 black acidic toxins to melt their vision and blade-like fins to slash them. Age: Over 250 million years Gender: Female