The Kokkai clan was a clan made completely of Baeshra Kothar's "Animal demons". They inhabited an island that was dangerous to anyone who wasn't a Kokkai or there allies. Baeshra's have animal traits specific to that part of the family and with pure strength alone could lift the weight of a bijuu. This when they are actively using there power, when they aren't they look like normal humans except with pointy teeth and black sclera.