Jerso

Jelso is a military operative under the command of Solf J Kimbley. He was used as a test subject in military experiments and is now a human chimera capable of transforming into a strange, toad-like creature. He is partnered with Zanpano.

Working for Kimbley
While being part of the military, Jelso and his partner Zanpano were Kimbley's body gaurds. They confront Scar and are easily deafeted by him and the Elric Brothers. Before Major Miles has a chance to execute them though, Alphonse convinces them to come with them on the promise that they may be able to get back their original bodies. They escape in the old mine shaft with Al, Scar, Dr. Marcoh, May Chan, and Yoki.

Confronting Envy
While in a small Ishvalan refugee camp, the group confronts Envy after Zanpano tips him off to their location. Zanpano actually tricks Envy into coming there to fight them, and plays a part in his defeat through May's long range alchemy, his and Zanpano's attacks, and Marcoh's Philosopher's Stone destroying transmutation circle.

Meeting Old Friends
After May is supposed to return to Xing with a weakened Envy, the rest of the group travels toward Central and meets up with Edward, Darius, Heinkel, Lan Fan, Fu and Hohenheim. They aid in Mustang's invasion of Central.

Abilities
Jelso is a human based chimera and can transform into a strange toad-like monster. While in this form, he can spit an extremely sticky mucus that can immobilize his targets and can also move quite fast for his size.