He is a Beastfallen; people who were cursed with the appearance of an animal, in his case a white tiger by the magic of a witch. Now he seeks another sorcerer that can reverse the curse so he can return to his human form and fulfill his wish of opening a tavern. 
Despite being mistreated, he has maintained himself as a better person. He has a gruff attitude, but is in fact a very kind person. 
In his recent travel, he found a young witch called Zero and he travels with her as her bodyguard.