Leech Devil

The Leech Devil, like most devils, has a great hatred for humans. She cared deeply for the Bat Devil, referring to him affectionately and trying to avenge him after his death. She and the Bat Devil shared a dream of devouring all humans together. Despite her relationship with him however, she seemed willing to spare Denji purely because he has a cute face.

The Leech Devil has a large wrinkled body with four legs and two tentacle-like arms. Her limbs are tipped with circular orifices like a leech and her face consists entirely of a single large mouth with blocky teeth. In the colored manga she is yellowish but in the anime she has more realistic dark leech colors. She has long black hair, and three pairs of udder-like glands.

As a Devil, the Leech Devil possesses all of the standard devil abilities. Besides those, it is shown that the Leech Devil's tongue was strong enough to pierce Denji's torso with ease.