The prevailing theory about Abominable is that he was once the rookie hero known as Cobalt who stumbled across a curse which turned him into his current form, though it’s difficult to be 100% sure. It’s all but impossible to get any kind of sensible information from Abominable. He is grouchy and violent but seems to have retained elements of his human personality and knows the difference between good and evil. He seems to have more or less retained his heroic tendencies and now protects Canada’s northern regions from any threat they face.
Alright, I admit it. This guy was supposed to be much less adorable than he ended up but now he kind of looks like Beast and I like it.