Nurunuru

Nurunuru (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 resembles a pair of human lips. The color of the lip bug is very important, as it tells when they are most energetic by their color.

Personality
Nurunuru appears to live a happy life under its summoner. When not being used as Ainz's voice, the bug is content to munch on a piece of cabbage and rest in the shade in its loved glass box.

Background
Nurunuru is a mercenary monster spawned with YGGDRASIL gold.

The Ruler of Conspiracy Arc
By the conquest of E-Rantel, Ainz has taken to caring for Nurunuru, who serves as his personal voice to maintain the image in the New World that Ainz Ooal Gown and Momon are two distinct characters.

Abilities and Powers
Nurunuru is an insect which attaches itself to other creatures' vocal chords and imitates 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 it is the creature’s special ability. It feeds on fresh cabbage leaves.

Ainz Ooal Gown
Nurunuru is Ainz's summon. Initially the magic caster was disgusted by the appearance of the bug, but has since grown quite fond of the insect making sure to feed and care for the lip bug.

Entoma Vasilissa Zeta
Ainz usually asks Entoma Vasilissa Zeta for taking care of Nurunuru.

Trivia

 * The Lip Bug shares its name with Nurunuru, a character from an alternate timeline.