Bhark

Bhark is the ruler of the 5th Hell, and of bone and horned devils. He is said to resemble a mass of bones. Not a skeleton, mind you, but a mass of bones vaguely resembling a humanoid shape.

They are said to speak in a multitude of voices, and are thus considered a collection of entities or a form of collective consciousness by many, rather than a singular being. Indeed, warlocks who have made a pact with Bhark often say the being refers to itself as "we".

Bhark is said to be the lord of lawful rule through guile, and is often referred to as the most intelligent devil.