Nulda was a female Devilman who had been fused with a snake like demoness. Her hands turned into cobra heads and her ended in dark snake tails. She had blank pupils and her entire body was covered in markings.
When the demon Nulda attempted to take over the body of a human woman, her pure soul and heart dominated Nulda's own and the woman became a Devilman, gaining Nulda's appearance and abilities. She became a member of the Devilman Corps and joined Akira Fudo's massive attack against the Anti-Demon Corps HQ. However, as the building was destroyed she was shot in the stomach by a machine gun, killing her.