Mantenna is a fictional character in the animated television series She-Ra: Princess of Power. He is a member of the Evil Horde, villains of the Masters of the Universe franchise. He is a creature with four legs and pop-out antenna eyes.
MOTU minicomics
In the minicomics, Mantenna is the least featured of the four original Horde warriors. He did, however, have his own showcase mini-comic, 'Mantenna and the Menace of the Evil Horde!'.
She-Ra: Princess of Power
Mantenna as he appeared in "She-Ra: Princess of Power" showing the fact that he has four legs to good effect.
When the Horde appear in the She-Ra: Princess of Power series, Mantenna retains his "spy sight" from the minicomics, and can fire energy beams of different varieties from his eyes, such as stun beams, gravity distortion beams, and freeze rays. Mantenna is a nervous stuttering imbecile mainly used for comic relief, with a running gag that Hordak frequently sends him down a trap door in front of his throne for any number of reasons. Although, once or twice Mantenna actually turns the tables on Hordak and sends him plummeting down his own trap.
Mantenna using his ray shooting eyes in "She-Ra: Princess of power"
2002 MOTU series
Mantenna and the other original Horde warriors are featured in a flashback in the episode "The Power of Grayskull". While not featured heavily, his appearance is far more serious and evil looking than it had been in She-Ra. A mini-statue of Mantenna was released by Four Horsemen Studios, based on their unreleased toy design.
Trivia
Although Mantenna had four legs, the action figure has the legs molded together in twos, making it possible to seem at casual glance that he only has two legs.