Quislet whose real name was an unpronounceable glyph was a microscopic energy-being from the alternate dimension of Teall , who flew around in a tiny spaceship. The Teallian civilization had devoted all its resources into building the ship with which to explore reality; although Quislet was often referred to as "he" despite lacking gender, or indeed, physicality, he told the Legion that he was an explorer selected by his people, though the truth is that Quislet stole the ship and fled through an interdimensional portal.

Quislet was able to emerge from his ship and "possess" inanimate objects, reshaping them on a second-by-second basis and thereby bestowing upon them mobility; however, these objects would disintegrate after at most, several minutes of "possession", a process which was only accelerated if he abandoned the object immediately. The only object not affected by this phenomenon was Quislet's ship, because it was apparently not made from baryonic matter. Quislet helped fellow Legionnaire Wildfire form a solid corporeal body, eliminating his need for a containment suit for a short time.

Eventually Quislet's ship was destroyed by the Emerald Empress, and he was forced to return to Teall, where he was captured. His ultimate fate is unknown