I like his name. Prolly unintentional, but it could also reference the Spy's Your Eternal Reward knife, 'cus of the "Yer" part.

As for the design itself.. while decent, but I feel it's rather bland. I think if the clothes were tattered and had several splotches of blood on them - or even had the crowbar be bloodstained / rusty - it'd sell the premise of Yerself more effectively. The only way the average viewer would tell that he's gone mad from being dumped is from his expression alone.

Not saying that said expression is bad. It's great, but I feel that it is doing all the heavy lifting in regards to giving this guy any distinct visual qualities, beyond just wearing his signature clothing differently, and wielding a color-coded crowbar.