Height: 148 Meters (488 Feet) Length: 219 Meters (721 Feet) Wingspan: 286 Meters (939 Feet) Weight: 133,000 Tonnes Moonhidorah is a giant three headed Lunar Hydra and the combined form of Io, Eura, and Callist, she is covered is silver colored scales with Grey patches on there horns. Each of there eyes has are black and have white puils. Each of the three heads on Moonhidorah have there own personality, not only behaving differently from each other but even having there own names. Callist, Io, and Eura can all feel each other, both physical and emotionally. Moonhidorah has black claws on her feet and clawed wings, which have small three short fingered hands that she uses to grip onto steep surfaces or certain objects. She has three tails that are long and capable of wrapping around objects or strangling opponents. Moonhidorah's wings can let her fly at speeds of 530 knots (609 mph), and can produce hurricane force winds. She is capable of rapidly healing from injuries and even regenerating limbs and organs, as long as sge has enough energy. Moonhidorah eats and consumes energy like radiation and electricity to survive. Does not talk or interact at all.

Io is the right head of Moonhidorah, she does not have the antlers of Her sister Callist, but does have the two horns on her snout and head, except one of the horns on her head was broken off. Io is normally calm and docile like her sister Callist, but can be extremely aggressive and violent of provoked. Io can breathe an incredibly powerful stream fire out of her mouth that's as hot as lava.

Callist is the middle head of Moonhidorah and the most dominant, her dominance is displayed by her massive antlers. She also has two horns on both her snout and just above her brows. She is the most calm and intelligent, her dominance is unquestionable as she controls the body and decides everything, despite this fact she is very calm and docile. Callist can breathe out a highly powerful electrical beam from her mouth that can obliterate anything.

Eura is the left head of Moonhidorah, and is the most irritable of her sisters, ger aggression is evident by the scars on her neck and face. Eura is very curious and playful, yet easily the most aggressive provoked or otherwise. Yet her aggression seems more of a dominance display towards other creatures as she tends to not go for the kill. Eura can breathe out an incredibly cold gust of ice mist and spikes, that can carry wind speeds up to 840 mph, and can reach temperatures as low as -178 degrees Celsius or -209 degrees Fahrenheit.