He met Jordan during one of his adventures, and is one of the few people on Earth to know his dual identity. Something of a mechanic, he helps repair a number of Jordan's devices like his plane, and on one occasion fixed his lantern battery by hitting it. He has no way of maneuvering through space on his own, so he rides on Jordan's back through the cosmos.
- Kyro has never appeared in a DC Comics publication.
- He is the alien sidekick of DC Comics' Silver Age Green Lantern Hal Jordan
- He was first featured in the 1967 Filmation animated series The Superman/Aquaman Hour of Adventure.
- The character was voiced by Paul Frees.
- He is featured in all the Green Lantern shorts made during the show's short run.
- Kyro was created as a replacement for Tom "Pieface" Kalmaku, Hal Jordan's comics sidekick, because "Pieface" was a racial slur and might have offended viewers.