Ezrick is half human/??? sorcerer, he could shape-shift anyone as a disguise himself so he won't be recognized. Magenta Diamond on his chest is actually his source of his power but it cannot destroy it. If only there is a way to destroy it but still remain a mystery. He only wore a mask to hide his face only in combat.
I might have created his backstory about what happened in his past but it will develop.
(This art from last month on my Instagram you could check it out.)