Caleb is a character in the game that plays a major part of the story in The Awakening and is currently the only other character you can fight together with in battles.
His attacks are powerful but take a few seconds to charge, leaving him vulnerable. He is a blind sorcerer who is skilled in magic. He can still see the world around him using a sixth sense he has had since birth.
His eyes and right arm was lost in battle, but he managed to create an artificial arm with dark magic. His arm is now his weapon in battles, using it to charge his magic attacks.