|Family and Relations||Unknown|
|First Appearance||Great Mazinger episode 29|
Giraginga resembles the popular images of characters from the Cthulhu Mythos including the cephalopod-like head that features four tentacles dangling from the lower jaw, a blue upper head, green fins on the side of the head, a black face, heterochromic eyes with a pink left eye and yellow right eye, and his orange colored true face on his forehead features a pair of bull-like horns. The body resembles that of a shrimp with a tail for a lower body, missile launchers on the torso, and a pair of spiked pincers for forelimbs. On the back are a pair of indigo wings that allow Giraginga flight.
Giraginga is capable of swimming using its tail to control movement underwater and can fly through its wings. The torso fires missiles from the four tubes on its body, while the head can act as a rocket. The tentacles on its face can also be used to restrain and lash at opponents.