Genbu Gamera
Gamera ( ガメラ ) is a fictional giant monster or kaiju originating from a series of Japanese tokusatsu films of the same name. He first appeared in Daiei Film's 1965 film Gamera: The Giant Monster, which was initially produced to rival the success of Toho's Godzilla; however, Gamera has gained fame and notoriety as a Japanese icon in his own right.
In the Heisei series, starting with Gamera: Guardian of the Universe (1995), the origin of Gamera was tweaked to make the theme much more directly heroic: a bio-engineered Guardian of the Universe created by Atlantis with the purpose of defeating Gyaos, another ancient creation capable of killing all human life.
In the third film of the series, Gamera 3: The Revenge of Iris (1999)... a scene provides Gamera with a link to Asian folklore, with a character relating a story in which a giant turtle is considered the Guardian of the North, with separate rival creatures defending the East, West, and South.
In the Showa series, Gamera fed on fire and was attracted by other heat sources such as power plants and Barugon's rainbow ray. He could breathe intensely hot streams of flame from his mouth when caught in a more serious situation. The Heisei version, on the other hand, could blast off mighty plasma fireballs from his mouth, usually very quickly and with varying accuracy; they were highly explosive. The Heisei version could also absorb a great deal of mana, or the living essence of Earth, and release an extremely powerful stream of pure plasma from his chest. In the final film of the Heisei series, Gamera blasted his own arm off and absorbed plasma fireballs shot by the Southern Guardian monster Iris, then used his stump to grow back his arm in a plasmic form.
Gamera also has the ability to fly. Generally, Gamera pulls in his arms, legs, head and tail into his shell, emits flames out of his arm and leg cavities, then rises up into and spins around through the air like a flying saucer. This mode of flight had an added advantage in the later films, where he used the sharp edges of his shell to cut enemies while spinning, similar to a circular saw. He has a second way of flying where he only pulls in his legs and/or tail, fires flames from the leg cavities and flies like a jet plane. In the Heisei era films, Gamera's arms would extend and stretch out into wing-like limbs similar to the flippers of a sea turtle whilst using this form of flight, giving him added aerodynamics and control.
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tl;dr - Giant badass guardian turtle that rivals Godzilla.