Nurunuru

Nurunuru-kun (ヌルヌル君) is a Lip Bug of Nazarick and Ainz's pet.

Appearance
Nurunuru is an insect with a brightly-colored body coated with sticky yet slippery secretions, and the front part of its body resembled a pair of human lips. The color of the lip bug was very important, as it tells when they were most energetic by their color.

Abilities
An insect which attaches itself to other creatures vocal chords and imitate the voice of its victims. It is a creature that prefers to hide in the darkness to avoid sunlight. Once applied on the user's throat, there is a change in their voice, given that was the creature’s special ability. It feeds on fresh cabbage leafs.

Trivia

 * It is a mercenary monster spawned with gold.