Stel is an alien super-hero known as Green Lantern and a member of the Green Lantern Corps. The Guardians of the Universe gave them a power ring fueled by willpower to protect Space Sector 3009. They are a sentient mechanical lifeform of the planet Grenda, considered a robot by some. Stel was created by John Broome and Gil Kane, first appearing in Green Lantern (Volume 2) #11. (1962)
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