Herman is Carl`s black-hearted, sadistic, evil ant brother and is the emperor of Antsylvania. He wants to use his massive armies to take over the world, which is something that he came quite close to doing. However, he has an allergy to Panda hair, thus Master Yo has beern able to stop him in his previous attempts. Despite his past failures, Herman refuses to let go of his ambitions, and his armies are always ready to march on a moment's notice.

Herman is considered a HUGE momma's boy, due to being Edna's favorite son for his successes. As shown in "Get Off My Back", his mother will either adore one or the other (when Carl put on his slippers of heart's desire, he reveals that he's always wanted his mother's love. When Edna was giving Carl tons of attention, she treated Herman the way she treats Carl, with no love and belittlement). In just about every scene that Herman and Edna have been in together.

It's been hinted in "Evil Dictator of the Year" that Herman is the eldest of the two. When Herman was born, Carl was no-where to be seen (though the clip was showning Herman right after he was born, so Carl may not have been in the room at the time). Despite his small stature, Herman is one of the strongest individuals in the world and makes use of that fact in order to force people into doing what he wants.

Characters
Protagonists
Yin • Yang • The Master Yo
Allies
Lina • Roger Skelewog Jr. • Dave • Coop • The Boogeyman • Jobeaux • Melodia • Vincent Von Growl • RainbowMane • Chai and Ti
Villains
The Night Master • Carl the Evil Cockroach Wizard • Eradicus • Eradicus' Minions • Brother Herman • Ultimoose • Yuck • Smoke • Mirrors • Saranoia • Zarnot • Pondscüm • Fastidious J. Spiffington • The Chung Pow Kitties • Kraggler • The Puffin • Mastermind • Badfoot • The Manotaur
Minor Villains
Flaviour • Grizzleflavin • Dank and Dire • G.P. • Charles • The Ants • The Blixens • The Smorks The Ranger Ron • Boopy Von Ha-Ha Pants • The GreedCo CEO • Shillshore • Ferocitus • Miss Millipede
Neutral Characters
Edna • Roger the Skelewog • The Lesson • Hershel
Other Characters
Muffin • F.L. Smeffman • Mrs. Skelewog • Coop's Mother • Lina's Father • Dave's Father • Dave's Mother Nancy O. Delffa • Tillman • Fuzzy Thunder • Chip • Annie • Samanthuh • Jeremy • Bird • Corky • Mark Clamuel • The Lie Fairy• CHAD • The Mighty Justice Orb • Terry Otter • Jason Earles • Mitchel Musso

Apeareances:Enter the Ant, Dictator of the Year, Family Day, Dojo Alone, Shadows and Light, Yin Yang Carl, Moon Over My Yinnie (cameo), Mission Yinpossible, Get Off My Back, Creeping With The Enemy (cameo), Splitting Hares.