An accidental superhero, Leather Boy possessed no skills or abilities, and only became involved in the superhero universe by mistake, killing Monkey Joe whilst disguised as Doctor Doom. After the original Avengers were dissassembled, Mr. Immortal posted newspaper ads appealing for new members. Leather Boy believed the ad for 'costumed adventurers' was for a S&M group, and was refused entry for not having any superpowers. Angered at his refusal and also by the acceptance of Squirrel Girl as a member, Leather Boy returned to the GLA headquarters disguised as Doctor Doom, and killed Monkey Joe in a brutal act of revenge. Leather Boy is just a terrible superhero. As well as not having any powers, the sight of this guy's costume is enough to have readers clawing at their eyes in a vain attempt to unsee it. As if this wasn't bad enough, killing a squirrel is pretty much the lowest you can stoop. There's nothing super about cruelty to animals, kids. Whilst superheroes are sometimes driven by an ulterior motive of revenge, to exact vengeance on someone's pet just isn't the way to get things done.
