Oslo

Oslo (オスロ) is King's pet Black Hound, who is an insanely vicious wild creature that will hunt enemies until it successfully kills them.

Appearance
Oslo is dog-like creature with dark purple fur, who is covered in scars, with his neck being the only area with white fur. Oslo has a fairly short tail, sharp and piercing teeth, and grows larger with it feels threatened, as all black hounds so. It shrinks into a small dog when not feeling threatened at all, with its scars not being visible when it is in the form of a small dog.

Personality
Oslo, just like all black hounds, is an insanely vicious that will not give up on a prey until it successfully kills it. However, Oslo appears to be quite submissive toward King, and acted like a normal puppy before them.

Abilities/Equipment
Oslo is very quick and power, which is seen when he quickly defeats two Holy Knight apprentices with ease. He also has the the ability to change his size depending on how threatened he feels. He grew very huge when Ban released a lot of killing intent toward him, and was later seen to be as small as a small dog when not threatened at all.