Sloen is a member of a group of young superheroes from the planet Sarus called the S-Force. He is the voiced by Ronnie Schell.
Sloen and his fellow S-Force teammates protect all beings of the galaxies from evil. Sloen first suspected the human Harold Cooplowski to be a bad guy when Targon mistook Coop's blundering with Megas as actual attacks on Earth.
After Coop defeated S-Force (by accident) then defeated S-Force's Arch Enemy, Ender, Sloen and the rest of the S-Force learned that Coop wasn't evil, just clumsy. The pair quickly became great friends over there shared love of junk foods and later helped each other in battle against Zarrik.
- Sloen is a parody of Tiny from Battle of the Planets, the first English-language adaptation of Gatchaman.