Homunculus Maids resemble diminutive female humans. They consist of three main groups made by three different Supreme Beings. The project in their creation was led by Whitebrim, who is the chief designer and he was assisted by Herohero and Coup De Grâce.
The Homunculus Maids are loyal to the Supreme Beings and Nazarick. They refuse to take breaks and wish only to serve Ainz Ooal Gown. Since all have never set foot beyond the 9th and 10th Floors of Nazarick, the maids are ignorant of what lies beyond. Though they do hold some anxiety towards the outside world, due to the massive player invasion that had once occurred in the past.
The Undead King Arc
- Main article: The Undead King Arc
On the last day of YGGDRASIL, Momonga meets one of the Homunculus Maids while walking in the hallways to go to the throne room. He notices how exceptionally detailed she is thanks to the efforts that his friends put in her creation. Momonga wanted to check more about the maid's hidden poses, but there was no time because the servers were going to shut down soon, he decides to move to the throne room. Momonga thanks the maid for her hard work because he felt he had to say it even though there would be no response from the maid.
The Emissary of the King Arc
- Main article: The Emissary of the King Arc
One of the Homunculus Maids called out to a Death Knight that was running through the halls of the 10th Floor. The undead pausing apologized as she berated. However realizing that he was a messenger of Ainz she quickly retracted her words, though the undead didn't hold it against her. The two parted on awkward ground.
The Show Must Go On! Arc
- Main article: The Show Must Go On! Arc
During Shalltear Bloodfallen's investigation of Albedo's suspicious behavior, she learned from one of the Homunculus Maids that Albedo plot to conduct a play of Romeo and Juliet. One of the maids gave Shalltear a cast list of the play, which marked Albedo as Juliet and Ainz as Romeo. After learning this information, Shalltear deduced that Albedo was using the play to steal a kiss from Ainz in the last scene of the tragedy.
The Two Leaders Arc
- Main article: The Two Leaders Arc
Ainz Ooal Gown created a new system where the Homunculus Maids are split into two groups, 30 of them for day shift, 10 of them for the night shift, and the maid that is left out gets to take the day off. Initially, the maids refused the idea of having a one daybreak, however, Ainz managed to convince them in the end by promising that if they accept the break, the maids that took the break will get to service him for the whole day. The maids accepted it because they think that they need to fully take a rest so that they can serve Ainz properly the next day. During their spare time together, the maids happen to competitively argued about which title is best suited for Ainz based on how each one of them views their master. While so, Nfirea Bareare, Enri Emmot, and Nemu Emmot were invited over to visit Ainz in the Great Tomb of Nazarick. Some of the maids who are on duty were present to serve various kinds of food to these special guests during their stay.
The Men in the Kingdom Arc
- Main article: The Men in the Kingdom Arc
The Ruler of Conspiracy Arc
- Main article: The Ruler of Conspiracy
In E-Rantel, Foss watched over Ainz all night without taking a rest. After her duty was done, Fifth take over from her.
Fifth dressed Ainz in a crimson robe adorned with gemstones. She was in the same room as Ainz when he started discussing what actions to take concerning the Sorcerer Kingdom's policy with Albedo, Aura, and Mare. She later accompanied Ainz when he decided to visit Pandora's Actor. She became emotional when she witnessed Ainz and Pandora's Actor have a "father and son" moment. She agreed to not speak of what she saw between the two of them.
She accompanied Ainz when they walk the streets of E-Rantel, she commented that she was happy with the Sorcerer Kingdom because Ainz ruled it. She found it rude that no one paid homage to him and that they kept peeking at him while hiding in buildings. She also said that humans were pitiable lifeforms. She agreed that all should kneel before Ainz Ooal Gown. Along the way, she accompanied her master to the Adventurer's Guild.
The Craftsman of Dwarf Arc
- Main article: The Craftsman of Dwarf Arc
Decrement served as Ainz's maid after he returned from the Baharuth Empire. When Ainz asked if she would be willing to die for him, she answered that she would gladly throw her life if he ordered her to do it. When Ainz asked if the other NPCs would do the same, she said that everyone would gladly accept death without a second thought.
Decrement was given the task of choosing clothes for Ainz to wear. Like the other maids, she was energetic about her master's orders. She and the other maids helped Ainz change his clothes, dressing him in a pure white cloth with a gigantic necklace made of gold and other metals and feathers with protruded from his back. She and the other maids shared a look of pride and satisfaction once they concluded their task. Decrement accompanied Ainz when Kyuku Zuzu was given an audience to deliver a message from his liege, Cocytus.
All of the Homunculus Maids' abilities and class are generally at level one. They also all possess 'Increased Food Consumption' as their racial penalty. This would mean that the Homunculus maids are voracious eaters, eating more amount of food than what a normal human can do.
Additionally, they were considered superior to level 1 human being in terms of stats. However, if it came down to a fight, a Homunculus would only have a 60% chance of achieving victory. The maid uniforms they wore did provide them with a measure of defensive strength, but that was only on the level of a high-class item.
According to Ainz, they are all noted to be equipped with magic items that will negate fatigue. Because of that, there will not be any problems whatsoever no matter how long they work.
Homunculus Maids are loyal to the Supreme Beings and they'll serve them well with their fullest effort. When Momonga was the last Supreme Being to remain, maids like Cixous were extremely happy and relieved to continue serving their master.
Homunculus Maids think of the Pleiades as a kind of idol group, with CZ2I28 Delta being the most popular among them. In addition, the Homunculus Maids consider being approached by Lupusregina Beta to be a sign of good fortune.
Although Ainz had decreed that Tuare would be a fellow worker in Nazarick, there was a subtle separation between her and the regular maids. The regular maids looked at Tuare as an outsider who was stealing their precious jobs from them. While they did not treat her coldly or disdainfully due to their master's orders, what they really thought sometimes shone through in the way they treated the human.
- In the Web Novel, there are only thirty-six homunculus maids.
- Unlike most of the NPCs that inhabit Nazarick, the Homunculus Maids enjoy eating.
- Ainz thinks that the Homunculus Maids are all masochists for being a workaholic which troubled him.