Taneleer Tivan was a character created by what two people?
Elders of the Universe The Elders of the Universe are a fictional group of supervillains appearing in American comic books published by Marvel Comics. The Collector was the first Elder to appear, and featured in "Avengers" #28 (May 1966), but the idea that he was a member of a group known as the Elders was not introduced until "Avengers" #174 (August 1978). The character was created by Roy Thomas and Sal Buscema.
Xavin Xavin is a fictional superhero in the Marvel Comics "Runaways". They are a Super-Skrull in training, created by author Brian K. Vaughan & artist Adrian Alphona, and debuted in "Runaways" vol. 2 #7. Although Alphona was the series' artist at the time, artist Takeshi Miyazawa first drew the character on print. Xavin had first appeared to the Runaways, taking on the form of a black male, but changed into a black female just for the sake of Karolina Dean, a lesbian whom they were to marry. Xavin is often seen as a male, simply to be "intimidating". Xavin, often called "Xav" for short, is known for their obtuse and warlike personality. They had originally found it hard to fit in with the Runaways due in part to their constant gender switching and unfamiliarity with Earth values and norms, though through proving their loyalty to the group, found acceptance. They are the child of the Skrull Prince De'zean.