Gau is an orphan. When he was nine bandits atacked his willage and killed his family. He snaped and went to fight the bandits alone. He killed most of them with a little help from Elle Ragu who adopted him. Gau is striving to become a Sevalle. He's a great admirer of Scarface and was raised by Elle after bandits killed his parents during a raid on his village. He is reluctant to fully utilize the power of Shadow Skill. He is the posse's beast of burden, maybe because he is the only male in the group -- but despite his slight figure, is able to carry all that the posse owns (two large vats and a some large bags tied on a wooden frame, backpack style). Sometimes the pack includes Elle as well, when she rides on top of their stuff.