Mane-iac

The Mane-iac is a female fictional Earth pony supervillain from the Power Ponies comics of Equestria, and is the main antagonist of the comic book superhero team, the Power Ponies. In the episode 'Power Ponies', she appears as the main antagonist who serves as the main person for the Mane 6 and Spike, whom have been forced to participate in, to thwart. In the end, her underestimation of Spike as a worthless character named 'Humdrum' became her undoing, and her plans to create a city of wild-haired ponies ruled by her mega-augmented mane were stopped.

Depiction in the Series
In the beginning of the episode Power Ponies, Spike shows Twilight Sparkle a couple of pages of a Power Ponies comic book on which the Mane-iac is depicted. Spike refers to her as the Power Ponies' "most evil nemesis." Spike says that she used to be the power-mad owner of a hair-care product company until she accidentally fell into a vat of green liquid and was electrocuted by a downed power line. The accident gave her strange new powers—such as a prehensile, stretchable mane—and caused her to go insane. Another page shows the Mane-iac breaking into the Maretropolis Museum and stealing something called the Electro-Orb. When Spike and his friends are sucked into the comic book world of Maretropolis and become the Power Ponies, they witness the Mane-iac steal the Electro-Orb from the Maretropolis Museum. The Power Ponies confront her, but she watches in amusement as the Power Ponies struggle to use their newfound superpowers before leaving the scene with the orb.

The Power Ponies track the Mane-iac to her headquarters at the abandoned shampoo factory and defeat her henchponies in a battle. However, the Mane-iac uses her "Hairspray Ray of Doom" on the Power Ponies, freezing the ponies in place and rendering their powers useless. She then takes the Power Ponies prisoner but leaves Spike/Hum Drum alone, considering it pointless to capture him.

Inside the factory, the Mane-iac uses the Electro-Orb to power her doomsday device, which resembles a cross between a large pink blowdryer and a cannon. The Mane-iac says she will use the cannon to amplify the power of her mane by "one million times", expelling an energy blast that will cause everyone in Maretropolis's mane to grow wild. As she gives her victory speech to her followers, Spike traps some of her henchponies and helps in freeing his friends. Just before the Mane-iac can use her weapon on Fluttershy/Saddle Rager, a firefly enters her line of fire, and she swats it. This action angers Saddle Rager, transforming her into a powerful muscular pony. The Mane-iac fires her doomsday device at Saddle Rager, but the beam reflects off Saddle Rager and hits the Mane-iac instead. Saddle Rager destroys the doomsday device, and the Mane-iac's mane grows out of control, wrapping around her like a straitjacket.

Personality
The Mane-iac is shown to behave in an evil and unhinged manner, expressing delight at the prospect of oppressing Maretropolis. She sneers at the Power Ponies when they fumble with their newly acquired superpowers. The Mane-iac thinks very little of the Power Ponies' sidekick, Hum Drum, even deciding not to take him prisoner with the other heroes. She is also portrayed as sadistic and cruel, claiming that the Power Ponies only keep Hum Drum around because they feel sorry for him and calling him useless. Much like her name is a pun, she often uses puns when she speaks.

Role in the series
While she appears to just be fictional, Mane-iac gains a major role when she realizes that she exists in a fictional world thanks to Spike accidentally combining the magic of his comics to those of the comics published by the Superiors. Realizing that there was a much bigger world to rule, she manages to convince all villains of both XD Comix and Generation Comics to join forces and become a bigger force to take over the UUniverses. But with help of the Shell Lodgers, the heroes of the comics are able to stop this comic-book chaos and banish Mane-iac back to her world. Though she doesn't give up now that she knows there's a big world that is ripe for the taking.