General Juuma was a Mikene Empire General and trusted servant of the Great General, who was first introduced in the 1974 OVA Mazinger Z vs The Great General. He was identifiable by his grotesque look which combine the image of the Seven Armies - On his head is a blue skinned-humanoid face (Superhuman) that sports a goatee as well as a lion like mane with red eyes on the forehead and cat-like ears that appear on the top of his head (Beast). His mechanical torso sports orange shoulders, a metallic front, black arms, a metal left hand, a grasshopper-like face on his abdomen (Insect), and a ghoul-like face for a right hand (Spectral). His lower body is centaur-like featuring long purple legs, a black body, a pair of gigantic red wings that extend from the sides (Avian), a crocodile-like face on the front (Reptile), and a tail that sports a fish on the end (Aquatic).

His only weapons were a Battle axe, fire breath which spew from the mouth of the reptile head and the ghost right arm which would extend.

In the OVA Juuma was called in by the Great General of Darkness and ordered to pick the best of the armies and search out and kill Koji and Mazinger Z. Once having their target in a gorge, Juuma and the Warrior Beast proceeded to torment and destroy Z, with a minor interruption when Borot -launch by the Photon Power Lab- hit and blew up Dante. With Z impale on the canyon wall, Juuma attempted to provide the final death blow by throwing his Battle Axe but was stopped by the arrival of Great Mazinger.

In an ultimate reversal of fortune, Great and Z team up and proceed to destroy the Warrior Beast force with Juuma as the last one standing - the distraught General attempts to burn Great, but Great's blew his fire breath away with the Great Typhoon attack onto Juuma. As Juuma fell to the ground in a fireball, Z impale him with Great's sword and the Mazingers dispose of him with a dual Breast of Fire blast.

His only other appearance was in the Mazinger Angels Manga "Save Aila!" arc where he was invading the lost continent of Mu. As well was a comical relief girl in Robot Girls Team Z, serving the Mycenae Empire Inc.