Triple Fighter is the fiercest warrior of Planet M, born when each fighter Green, Red, and Orange combined. Triple Fighter's form consists of the "superior intelligence" of Tetsuo (Green Fighter), the "tough body" of Yuji (Red Fighter), and the "innocent heart" of Lily (Orange Fighter).

The evil Devil Monsters from Planet Devil wiped out the population of Planet M except for three siblings who escaped to Earth. They were Tetsuo/Green Fighter, Yuji/Red Fighter and Lily/Orange Fighter. Triple Fighter is formed when the three siblings merge together.

The large circular plate on his chest. It marks the limit of someone out of Three Fighters or if all three are too weak to fight, by changing to the Fighter's personal color, the remaining time is 1 minute before the Three Fighters are forced to return to themselves, this is Triple Fighter's only weakness.

The three fighters stand around in a circle and jump, shouting "Triple Fighter" together. They spin around in the air and merge into Triple Fighter.