I haven't said much about SubZero other than he's a bit more aggressive than normal wolves, hence why he's so wounded. My first OC: SubZero, was originally NOT a wolf. SubZero was originally going to be an ice-dragon, and SubZeroTheWolf was originally going to be SparkyTheWolf. Sparky was going to be an albino wolf, (white wolf with red eyes) while SubZero was going to be a cyan color. The SubZero we all know and love now is heavily wounded due to many accidents. His left ear was sliced open while helping one of the pups in his pack that was going to drown, the river where his pack lives overflows every season. The water rises fast and could easily drown any wolf not fast enough to get away, but due to his frantic run from the water his ear clipped a tree branch that was hanging low. The scars on his front left leg, back left leg, tail, and back were wounded from wolf fights with other packs. His right side's giant wound was from cruel people, They tried taking strands of his DNA for tests because they though he was a test subject who had escaped and had potential harmful illness etc. Due to his left paw being gray and the rest of his leg being dark gray they thought it was a illness that only infected his leg. They used anesthesia but SubZero didn't fall asleep, he couldn't move though. Once the anesthesia's numbness wore off, he ran away back to his pack. They didn't have time to finish, leaving his wound wide open. (SubZero didn't have any illnesses BTW)
His Heterochromia (different colored eyes) is just how he was born, if you're wondering his left eye is blue and his right eye is green.

I hope that gives you more information about SubZero's origin and personality.