This is Tommy(now known as Gamma). He was Axel's childhood companion.One day Axel accidentally released a radiated monster into the town.It killed the town leader.Axel took his sword and defeated the monster,but before he killed it the monster slashed him in the left eye,leaving a scar. Axel blamed Tommy and he was ordered to be slashed in the face with a sword made of the monsters skin,then exiled. The slash went through his right eye and left a black edgy zigzag making him partially blind.On a plus note the scar its self bestowed physic powers to him.He has a everlasting grudge on Axel.
Unlike the rabbit protagonist he is a gerbil.