Emur is a jungle boy who appears in all 3 issues of Donatello and Leatherhead from July to September in 1993.
He was abducted by a strange ship in 1920 and then taken to the Hollow Earth, called Tayklo. Those who live in Tayklo are immortal, and Emur has been trapped there ever since. He wants to escape with Donatello and Leatherhead, but eventually decided to stay and help Andresla and her Amazons co-exist peacefully with the Atlanteans.