Ainz Ooal Gown

Ainz Ooal Gown, formerly known as Momonga, is the main protagonist of the Overlord series. He is the guildmaster of Ainz Ooal Gown, Overlord of the Great Tomb of Nazarick, and the creator of Pandora's Actor. He is regarded as the highest of the Almighty Forty-One Supreme Beings by the NPCs of Nazarick.

In the New World, he is the Sorcerer King of the Sorcerer Kingdom and the most powerful magic caster in the world. His other identity is famously known as "Momon," a dark warrior and leader of Darkness, an adamantite ranked adventurergroup of that nation. He is an adamantite class adventurer and the strongest adventurer known in E-Rantel.

In the year of 2138 before taking on the name of Ainz Ooal Gown in the New World, Momonga was his original name as a player in YGGDRASIL. But in reality, he was a human being by the name of Suzuki Satoru, his true identity. Whenever Suzuki left home while heading to his workplace, he wore an air filtering mask and goggles to prevent himself from being affected by the toxic air outside. He used to be the sort of person who wasn’t bothered by seeing the corpses of orphans since he encountered them so often on the streets that it was hardly a rare occurrence for him anymore.

Early in his life, Suzuki lost his mother when she overworked herself to death. Her death occurred in the kitchen of Suzuki's home, where she collapsed on the floor while trying to make his favorite dish. He vividly remembered seeing it happen with his own eyes in the morning upon waking up. In terms of receiving fatherly love from his father, he claimed to have never experienced something like that before in his life.

On the other hand, Suzuki Satoru was an elementary school graduate and salaryman who lived alone in a broken-down apartment. Because Momonga did not have any real family or friends to support him, he dedicated his whole life instead to the DMMO-RPG, YGGDRASIL, and just his guild. His life was an endless cycle of going to the office to work. He had often seen kids who had just graduated elementary school working alongside him on the job. As a salaryman, he recalled how his bosses announced to their employees that they would only begin work once everyone including himself had arrived on time. Thus, all he could do was suppress the urge to go home, because he truly understood how they felt. The kind of people Suzuki hated by far were those who rejected other's opinions without offering solutions of their own as well as crappy customers who knew nothing.

Sadly, fun memories of the times he spent with his friends as members of Ainz Ooal Gown were all he had in the game compared to the real world. Momonga's daily livelihood to the game had even gone so far to the extent where he used up most of the money financially obtained by him from working to have it purely used for YGGDRASIL. His salary earnings were meager, but he still lived above the poverty line. Momonga had an ample balance in his bank accounts, yet he had no idea how to spend that money. In the end, it was apparent that Momonga had already spent almost one-third of his monthly salary on cash purchases for the game.

When Momonga first began playing YGGDRASIL, the idea of killing heteromorphic races was a common practice in YGGDRASIL. At that time, he was one of the targets who was hunted down and killed by PKers multiple times. Having enough of the harsh treatment, he was very close to quitting the game until Touch Me's words had saved him.

In the anime, he was shown to be surrounded by a group of PKers in their attempt to finish him off while mocking his character avatar. However, as they were about to carry out the PK on Momonga, Touch Me suddenly came to his rescue and defeated them simultaneously. Since then, both Momonga and Touch Me made friends with seven others like them together to form the First Nine, which started out as a PvP/PKer clan, known as the Nine's Own Goal.

At some point in time, during a meeting with his clansmen, Touch Me thought of disbanding the Nine's Own Goal and wanted to form a guild and recommended Momonga to be their leader. Once the clan was dissolved and the members present agreed to accept Momonga as the guildmaster, he and friends created an official guild called Ainz Ooal Gown. Carrying out the role as the Guildmaster of Ainz Ooal Gown, Momonga was now tasked with miscellaneous work, such as contacting people in the guild from this moment forward.

Right after the guild was created, Momonga would lead Ainz Ooal Gown and its members to an unknown dungeon called the Great Tomb of Nazarick thanks to the efforts of his friend, Nishikienrai, for locating it. Due to Momonga's leadership and cooperation with his guild members, it led to the guild being able to conquer the Great Tomb of Nazarick and shortly afterward, also acquiring a World Item called the Throne of Kings the same moment they cleared the dungeon. The dungeon would later serve as Ainz Ooal Gown's future guild base while dealing with the invasion of players intruding on their location.

On the other hand, there were other players who started to perceive the guild of heteromorphic races as evil beings that must be defeated at all costs. Hence, the guild members of Ainz Ooal Gown, including Momonga, thought that it was only proper for them to become real monsters. It was indicated during the players' invasion of their guild base that Ulbert suggested they should also act as final bosses unless the enemies were able to reach them.

During those years, Momonga and his guildmates spent most of their work and effort focused on building their guild weapon, the Staff of Ainz Ooal Gown. In addition to that, Momonga and his guildmates created their own customized NPCs, which for him was Pandora's Actor. He made Pandora's Actor to not only preserve the identity of Ainz Ooal Gown, but to serve in protecting the guild's Treasury for starters. At some point in time, however, nearly 37 out of his 41 guildmates quit the game altogether, leaving the guild and giving away their player's equipment to Momonga. Not only did they quit the game, but they also deleted their character's avatar completely. This was due to the real-world issues that they had to deal with. He would later store most of his guild members' equipment in the Treasury for safekeeping. Momonga also made all of the Avataras in the image of his guildmates who quit the game.

Prior to them leaving the guild and YGGDRASIL, Momonga would return straight home after work every day and log onto the DMMO-RPG ahead of everyone else. It was something he did during the era when the guild was still actively thriving with plenty of members online. There, he would also begin making preparations in Nazarick before his comrades came online. He would summon numerous undead to protect himself as well as hire NPC mercenaries to hunt down monsters with the guild's goal in funding Nazarick. Extremely dedicated to the game, he was used to playing on his own most of the time when everyone else was offline or inactive in YGGDRASIL.

Since most of his guild members had already quit the DMMO-RPG, Momonga continued to stay behind and kept their guild base running. He had begun solo hunting areas and farming for things by himself to a nearly ridiculous degree to earn the gold needed to maintain the Great Tomb of Nazarick. The dungeon seemed to be in top-notch shape according to Herohero, as he apparently had taken notice of Momonga's efforts to manage it as their guildmaster. Herohero believed that Momonga's devotion to maintaining the dungeon for this long was in hopes that they would one day return to the game and play with him again. Because of that, he did not bother to build new friendships with other players and avoided them, as well as the high-difficulty areas he used to visit when his guild members were still around. Then, he would deposit his earnings in the Treasury before logging out. This had been his routine almost daily. As such, he did not have much contact with some of the NPCs and hardly knew a thing about them until now.

Nonetheless, the tedious labor Momonga had spent while maintaining their guild base financially had managed to paid off, as no players were able to conquer the Great Tomb of Nazarick even after the game's shutdown. This also applied to the number of times and efforts he put forward into the game to prevent the guild's rank being formerly 9th from dropping any further than 29th as its current ranking. Strength-wise, Momonga did it all on his own as he was the only manpower who happen to be active daily within the guild.

In the Legacy of Chris Thorndyke, he is a member of the Council of Light along with Ulbert Alain Olde, the Seven Floor Guardians and the Thirteen Heroes, The reason they are together is because of an interesting proposal from Zeus of Smite and also a truce for a while given that Tokoyami is planning war on the omniverse and he could technically be one of the personifications of Death itself and he watches over the multiverse.

And he is reprised by Christopher Guerrero in the English dub and Satoshi Hino in the Japanese dub.