He safeguarded the fist for one hundred years until its successor, Marty, was found. Gaff – An ancient robot who has served the Eon family for more than 130 years.He's shown to possess a natural talent for fighting and grows stronger as the series goes on. Marty is the last descendant of the Eon family and is also the last heir of Eon.

He was originally named Iron Kid in the original Korean version. Endowed with the power of the Fist, he must fight the evil forces of the General. Marty later discovers that he is a direct descendant of Eon, who 100 years prior to the series' start defeated the General and ended the Robot War.

While scavenging for robot parts to sell he finds the Fist of Eon and puts it on, although unwillingly.

Martin (Marty) – Marty, or Eon kid, is the lead character of the series.

He has only spoke to Marty once, although it was a hologram of him that actually spoke to him in The Temple of the Iron Soul where he once trained to learn control of the fist. His weapon, later called the Fist of Eon, was passed down through his family for 100 years.

Eon - Eon was the hero who ended the Second Robot War by destroying the General, but unfortunately he died in the process.

The home has fallen into great disrepair since the death of Marty's father. Underneath the home is the family's ancestral training ground that includes wood training drones and tests to hone the family's martial arts skills. Their ancestral home is a huge fortress surrounded by a bamboo forest. The General's forces wiped out the family through the years leaving Marty the sole blood heir to the family legacy. Only Eon, Marty, and his father have been mentioned, but all members are great warriors and martial artists. The Eon family is the legendary family that defeated the General.

1.3 Government Central Defence Federation (CDF).

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