Vess Kogo was a Force-sensitive human male Emperor's Hand and former Jedi Padawan durind the final years of the Old Republic. Vess hailed from the planet Mandalore and was brought into the Jedi prior to the outbreak of the Clone Wars, he grew close with fellow Padawan Caleb Dume later known as Kanan Jarrus. During the attack on the Jedi Temple Vess was spared by Lord Vader who brought him before the Emperor.
Powers and Abilities
as a former Jedi Padawan Vess held great talent with the Force even without Palpatines training. Out of all the Hands he was the closet to the dark side and would isolate himself from the others.