Zeb (The Serpent Sorceress)
From Jenny Everywhere Wiki
In Reality Z-25 31-H, Zeb was a tame zebra living in the Naked Jungle of Buranda who was sometimes ridden by Gwenna.
Gwenna rode Zeb to the Natari village to meet the Commissioner after he warned her and Kaza about Nerlana, arriving just in time to save the Commissioner from a Serpent Cult assassin. (COMIC: The Serpent Sorceress)