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.