Five Worst

Five Worst (五大最悪) refers to the worst NPCs in the Great Tomb of Nazarick.

Background
While being referred to as a group, there doesn't seem to be any special relationship between them. They are all just the most disgusting in their respective categories. Each member's own epithet describes their worst feature. Due to their disgusting behavior or appearance, some NPCs of Nazarick detest the Five Worst. While it is clear that their enemies will consider them to be evil abominations, not all of them are extremely evil, personality-wise.

The Undead King Arc
Albedo informed Ainz that one of the Five Worst, Neuronist Painkill is given the task of interrogating the captured members of the Sunlight Scripture.

The Invaders of the Large Tomb Arc
Concerning the Re-Estize Kingdom, Nazarick was able to successfully reduce the authority of those in power from that nation with the help of Mare, Neuronist, and Kyouhukou. Thanks to them, Nazarick should be able to slowly infiltrate their ranks without a problem. Due to their effort, the Kingdom will eventually come under Nazarick's full control from this moment forward in the near future.

Later on, the same two members of the Five Worst, Kyouhukou and Neuronist Painkill who participated in Operation Gehenna are also tasked with handling the worker groups that invaded Nazarick. The third member, Gashokukochuuou, was awarded two fresh bodies for living space.

The Pleiades Day Arc
After E-Rantel’s annexation, the Five Worst journeyed to the 6th Floor for Gashokukochuuou's house-warming celebration.

Strength
Based on the known status of Neuronist or Kyouhukou, it seems that they are not all for battle, as it is clear that real "torture" would not be allowed in YGGDRASIL. The role of the Five Worst might have been nothing more than repulsing the enemy with their disgusting features, or just decoration.

However, after the Great Tomb of Nazarick was transported to the New World and all the NPC’s gained sentience and becoming real, the Five Worst’s occupation have similarly become real as well. This is seen where Kyouhukou and Neuronist Painkill are able to fully torture their victims and fulfill their intended functions in the game in real life.

Known Members

 * Neuronist Painkill - Worst Occupation
 * Kyouhukou - Worst Residence
 * Gashokukochuuou - Worst Appearance
 * Chacmool - Worst Personality
 * ??? - Worst Ero
 * Tentacle Cage - A tentacle type monster similar to a Roper. Yet it is said that he (maybe she) has a gentle personality, so he is more popular than the Worst Personality.

Trivia

 * In the Web Novel, the title "Five Worst" does not exist.
 * While it seems that each of the Five Worst have their own residence, it uncertain whether all of them are Area Guardians or not.