Hideous crossbreed between a giant fly and a human

Ekivu resemble a hideous crossbreed between a giant fly and a human. Their hind legs are insect-like and their fore-limbs resemble human arms, but with bony, sharp claws. Like flies, their bodies are covered in blueish-black chitin with bristling hair. Their heads are vaguely human, but with bulbous, faceted eyes like those of a fly. Their mouths are ringed with sharp teeth and their long noses are actually a sharp proboscis for drawing blood from their victims. Ekivu can be hit with normal weapons, although they are invulnerable to all forms of poison. Ekivu have a long standing hatred of most other classes of demons, especially classes A and B. Ekivu have managed to enslave a number of shub, which they use for their own nefarious ends.