Demon Seed Arc
- Kuan (クァン)
- A wild boy Chōjin that befriends Mantarō after a devastating loss.
- The Constellation (ザ・コンステレーション)
- An Icelandic constellation chojin. Choujin Power: 8,200,000. He had similar 4D powers to Pentagon and Black Hole. He defeated Buffaloman and then defeated Mantarou's Muscle Millennium technique. Mantarou eventually defeated him with an incomplete Muscle G.
- Gepparland (ゲッパーランド)
- A fish-faced chojin from Marseille, France. Choujin Power: 8,450,000. He fought and lost to Hanzou.
- Meltdown (メルトダウン)
- A motorcycle chojin from Chicago, Illinois. Choujin Power: 9,540,000. He fought and lost to Ilioukhine.
- The Tattooman (ザ・タトゥーマン)
- Chojin from Hokkaidō. Choujin Power: 8,600,000. He fought Barrierfreeman to a draw.
- Voltman (ボルトマン)
- A high-voltage Jamaican Chojin with a microwave oven in his chest. Choujin Power: 12,000,000. He and Ashuraman formed the tag team The Demolitions. They fought and defeated Kevin Mask and Scarface and then faced Mantarou and Kevin. Voltman was defeated by Mantarou and Kevin's Niku→Lap technique.
- Reborn Ashuraman (再生（リボーン）アシュラマン) / Shivano
- An Asura chojin from the previous series. Choujin Power: 10,000,000. A family tragedy turned him back to the side of evil. While fighting Scarface he developed the Ultimate Ashura Buster, combining the Ashura Buster and the Ultimate Scar Buster. He was defeated by Mantarou's new finishing move, the Muscle G.
- Shiva (しは)
- Ashuraman's son. He was training to be a Seigi Chōjin like his father, but when he discovered Ashuraman's evil past his demon blood takes hold of him. He later kills his mother causing Ashuraman to kill him and, as a result, return to his demon ways and team up with General Terror.
Read more about this topic: List Of Ultimate Muscle Characters
Famous quotes containing the words demon, seed and/or arc:
“The history of the genesis or the old mythology repeats itself in the experience of every child. He too is a demon or god thrown into a particular chaos, where he strives ever to lead things from disorder into order.”
—Ralph Waldo Emerson (1803–1882)
“The hearts of small children are delicate organs. A cruel beginning in this world can twist them into curious shapes. The heart of a hurt child can shrink so that forever afterward it is hard and pitted as the seed of a peach. Or, again, the heart of such a child may fester and swell until it is misery to carry within the body, easily chafed and hurt by the most ordinary things.”
—Carson McCullers (1917–1967)
“You say that you are my judge; I do not know if you are; but take good heed not to judge me ill, because you would put yourself in great peril.”
—Joan Of Arc (c.1412–1431)