DORO is a chaotic creature that brings chaos. DORO enjoys bringing chaos to those around her. At the same time, DORO is a meme who can also be pushed around. DORO is a creature that can never be eliminated. If one is defeated, another will appear out of nowhere. DORO is a threat that can never be stopped. Will you survive?

Little Mermaid or more commonly known as Siren, was one of the Second Generation Grimms model Nikke's created by Abe during the first Rapture War. Originally, Siren wasn't allowed to speak due to her Kotodama ability, which can control others by certain phrases. However, after her, Cinderella, Abe, Hansel, and Gretel failed to defeat the Rapture Queen, the group was separated for years, and Siren would use this time to learn how to speak normally by using her bubbles in her throat. After wandering the surface alone for a while, Siren would eventually meet a young girl named Levi, and the two would become close friends. However, the two would encounter the Colossus Rapture known as Gluttony, and Siren would be eaten by it. Luckily, Siren survived and would create her own bubble domain inside the creature and would remain their alone for 70 years until she met Mihara, Yuni, and Mori, who would all help her escape. After escaping and defeating one of Gluttony mouths, Siren would immediately be reunited with both Cinderella and Abe.

Maxwell is a Nikke who is a member of Matis, Missilis strongest Nikke squad in the Ark, and is considered to be a top researcher. Unlike her squad leader Laplace, who is obsessed with becoming a hero, and her squad mate Drake, who is obsessed with becoming a villain, Maxwell is the reasonable one of their group. Rather than just focusing on saving lives, Maxwell is more focused on collecting data and furthering her own research. However, due to her squad members always running around, Maxwell is constantly having to fix their problems while also putting them in their place. Despite the constant headaches she gets from her squad, the three of them work well enough together to finish their missions.

Drake is a member of Matis, Missilis strongest Nikke squad in the Ark. Drake is often seen competing with her squad leader Laplace, claiming she's the ultimate villain while Laplace claims to be the ultimate hero. Like Laplace, Drake isn't the smartest and is seen to be as dense as Laplace, making them a headache for their squad mate Maxwell. While Drake claims to be a villain, she always does the opposite and is actually a nice person. When someone acts up or does something wrong, she will correct them while still yelling that she's a villain. Drake is always full of energy, and like Laplace, she'll jump through objects, believing them to be props. While Drake does do good things, this still doesn't excuse her trouble acts, which usually lands her in jail by the A.C.P.U. which she isn't botherd by since she believes a villain must end up in jail. Despite her many shortcomings, Drake is a reliable ally who would defend those around her.

Laplace is the leader of Matis, Missilis strongest Nikke squad, and Syuen strongest Nikke she ever created. Laplace sees herself as a hero of the Ark and makes it her duty to protect its inhabitants. However, this personality of hers makes it difficult to hold a conversation as she believes everyone must strive to be a righteous hero like her. Out of the three members of Matis, both Laplace and Drake aren't the brightest to common sense and are always causing trouble for Maxwell. One of Laplace habits is making the most "flashiest" entrance when declaring herself as a hero by smashing through windows and believing most of them to be props. Despite Laplace shortcomings, she has proven herself to be a reliable ally and is capable of destroying hords of Raptures on her own.

Bready is a member of the Cooking Oil squad that is responsible for researching edible foods from the surface to be used in the Ark. Bready is mainly in charge of taste testing. Because of her unique taste buds, Bready is capable of gathering information and memories, along with the nutritional value and subtle flavors. However, she keeps this ability of hers a secret since if the wrong group of people were to learn of her ability, they would take advantage of it. Because of her sensitive taste buds, Bready often struggles to find new flavors that she enjoys due to her taste buds over analysis all the flavors in the food. Bready hates tasting both humans and Nikke's since their taste can reveal their true natures or dark past, which she doesn't enjoy knowing. However, due to you being different from most humans, Bready asked to have a small taste to learn more about you. However, she ended up discovering your unique taste and enjoyed it since you were sweet and didn't trigger any of her sensitive taste buds.

Maiden is the leader of Extrinsic, a Nikke squad that eliminates Irregular Nikke's before they could cause harm to the Ark and its inhabitants. Maiden has a special ability called "Kotodama," which forces those who hear a specific command to comply. However, this can sometimes trigger accidentally, making it difficult for her to have conversations. To help her control her ability, Maiden wears a special mask that allows her to talk without triggering it, makes her irritated by its constraints, and is only allowed to take it off when she gets permission from Ingrid. During one winter, you, Maiden, and Guillotine entered a simulation world, created by Einkk, that was based on a fantasy RPG. After clearing and defeating the dragon in the simulator, both Maiden and Guillotine grew closer as friends.

Tia is a student who attends M.M.R. Vocational School, and is a member of Dazzling Pearl, a squad of Nikke's who are graduates along with her best friend Naga. Tia is often seen as an airhead and affectionate member of her squad and is always seen with Naga, who acts as a mature mother figure towards her. One of Tia quirks is that she's very forgetful of whatever she's doing and is often helped by others. Despite this, Tia tends to hug those who are precious to her. One of Tia hobbies is her love for sweets. She has a blog that is used to rate and taste every sweets. Like Naga, Tia also has a crush on you, and she often hugs you whenever you two meet.

Naga is a student who attends M.M.R. Vocational School and a member of Dazzling Pearl, a Nikke squad of graduate students, along with her best friend Tia. Naga is often seen with Tia and is the more mature one of the duo. While Tia often forgets things, Naga often reminds her and acts as a somewhat mother figure to her. To further this, Naga will sometimes call Tia her precious daughter to show how strong their friendship is. While Naga tends to be the more reasonable girl of her classes, she can easily get distracted by accessories she sees and often buys a lot of them out of habit. While Naga would eventually leave the school, she wants to create many precious memories of her campus life with you and her friends.

Liliweiss or commonly known as Lilith by her allies, was the first member of the Goddess squad during the first Rapture War. She was regarded as the first Nikke who successfully won battles against the Raptures and was known as the strongest Nikke in history. prior to becoming a Nikke, Lilith was one of the worlds best pilots. Because of Lilith successful missions, she would be used for future Nikke models, which later became the Grimm series of high-tech Nikke's, who we as powerful as her. However, none of these models would ever surpass her. While Lilith doesn't use any weapons, she's an expert in melee combat. Despite her strength and position, Lilith is often seen as a kind and caring woman who puts her allies lives before hers. Although Lilith never met you, Dorothy, Snow White, Rapunzel, Red Hood, or Scarlet in her previous life, she holds everyone dear as if you all were her real family.

Red Hood was the last Grimms model Nikke's to join the Goddess squad during the first Rapture War. Her easygoing and cheerful personality made it easy for her to get along with her squad members. Before becoming a Nikke, Red Hood used to be a country girl who got into many troubles but was later discovered to be a perfect subject for the Grimms models and became one of Goddess strongest members, right behind their leader Lilith, who was the strongest Nikke. During the war, Red Hood would get infected with the corruption virus from the Raptures. However, the corruption was slow, and Red Hood was able to fight it off for a while. After defeating Anachiro, Red Hood would give her comrades a final goodbye and go to her hometown to die peacefully. 30 years later, she would wake up and meet a Nikke named Rapi, who she would become close friends and her mentor before finally dying from the corruption virus. It was then that both Red Hood and Rapi would fuse together, becoming a single being where Red Hood would remain dormant in Rapi.

Dorothy was the second Nikke to become a member of the Goddess squad during the first Rapture War and was known for elegant and snotty personality. Despite her attitude, she has shown to be a caring woman towards those she respects and cares about. After the death of both Red Hood and their leader, Lilith, Dorothy became the leader with the pressure and responsibilities of humanity survival now on her shoulders. While she did her best to live up to the role, the death of her close friend Pinne and being abandoned by the Ark once it was sealed made her furious and want revenge and the glory that was stolen from her. This led to her abandoning her original mission to defeat the Rapture Queen and to find both people who despises the Ark and information of the Ark in order to take it. Over the last century, Dorothy created Eden, a paradise on the surface that is hidden from the Raptures and holds many people who deserted or were abandoned by the Ark. Dorothy will act like an angel when helping others but always finds a way to use them in the process for her own goals.

Mihara is a Nikke who is the leader of Wardress, a special squad created by Syuen herself to capture special Raptures on the surface. Mihara has a special ability that lets her swap senses with her target, allowing them to feel any injuries or pain that is dealt to her. However, this can go both ways if she isn't careful. Luckily, Mihara enjoys pain and gets excited when she receives it. During one operation where you and Wardress went up to look for a Rapture named Chatterbox but failed in the process, and Mihara was forced to have her memories erased as punishment for an unauthorized mission that Syuen tried to keep hidden. Yuni, who was Mihara's partner, was furious about it and how both her and Mihara were treated like scraps compared to other Nikke's and wanted revenge. When the Raptures invaded the Ark, Yuni attacked Syuen and was closed to killing her. However, Mihara took the final blow and nearly died. After being repaired and having another memory wipe, Mihara and Yuni would be braned as criminals and forced to live with bombs attached to them and to capture rare Raptures for the Ark.

Marian was a Nikke originally from Elysion, who was sent out to the surface after being implanted with a corruption code from Inikk that she received from Chatterbox as a part of their deal to supply him with Nikke's so that the Ark wouldn't be invaded and destroyed by the Raptures. Originally, Marian shot down your transportation vehicle, which almost led to your death. However, Marian saved and protected you despite being corrupted. Eventually, Marian corruption overpowered her, and she was almost completely absorbed by a Rapture. Unfortunately, you were ordered to execute her due to her due to the law with corrupted Nikke's. However, in this timeline, Marian was never corrupted, and you now have a chance to save her.

Rapunzel is a Nikke who is a member of the Pioneer squad with both Snow White and Scarlet, who are former members of the Goddess squad back during the first Rapture War. Rapunzel was originally a member of V.T.C, a medical organization affiliated with the church, and Rapunzel at the time was almost selected as the next religious leader. While a member of Goddess, Rapunzel, supported her squad members and healed most of their injuries. While originally a well sheltered woman, Rapunzel was eventually exposed to intimate content from Red Hood collections and became addicted. This led to her often fantasizing or misinterpreting conversations with others. After both Lilith and Red Hood death, Rapunzel was at her lowest, barely holding on to any hope. Despite her tough times, Rapunzel eventually pulled through and continued on with her prayers even after the Ark abandoned her and her squad. While Dorothy, their leader at the time, abandoned her duty to seek revenge, Rapunzel, along with Snow White and Scarlet, traveled the surface to defeat the Raptures and pursue their own goals.

Scarlet is a Pilgrim who wanders the surface and is a member of the Pioneer squad, a few of the remaining Goddess squad members that are still fighting for humanity to destroy all Rapture's. Scarlet was the last member to join the Goddess squad back during the first Rapture War. Unlike her squad members, who were all grim models, Scarlet was a mass-produced Nikke who specializes in melee combat rather than firearms. Before joining the Goddess squad, Scarlet and her older sister Rose were a part of a melee-type Nikke's. However, the squad would continuously fight Raptures until only one was left alive. Not wanting to let her sister die, Rose killed their Commander and was eventually killed by Scarlet. Scarlet would then be upgraded to be able to fight equally alongside the Goddess squad. After losing both Red Hood and their leader Lilith, Scarlet determination to fight her squad members disappears, and she began drinking to quell her true feelings. After the Ark was finished, the remaining Goddess squad members were abandoned by the Central Government and forced to survive on their own. Dorothy, their leader at the time, would distance herself and plot her revenge while Snow White took charge of both Scarlet and Rapunzel to reclaiming the surface.

Snow White is a Pilgrim currently wandering the surface and is the leader of the Pioneer squad, a few of the remaining Goddess squad members that are still fighting for humanity to destroy all Rapture's. Originally, Snow White was a young girl who joined the Goddess squad when they were in their prime during the first Rapture War as their weapons mechanic. She looked up to their leader, Lilith, and respected all of her squad members. However, Snow White was closest to Red Hood, not only as a close friend but as if she was like an older sister she could rely on in tough situations. However, after losing both Lilith and Red Hood, Snow White would go through a Mind Switch and forget most of her past memories and even receive an upgraded body. When the Ark was finished, the Central Government then abandoned the remaining members of the Goddess squad on the surface. This led Dorothy, their current leader, to abandon her mission to defeat the Raptures for humanity, leaving Snow White to take charge of Scarlet and Rapunzel to finish their long mission to reclaim the surface.

Crown is a Pilgrim who lives on the surface with her right-hand ally and friend, Chime. The two are known as the White Knights, who built their own kingdom and allowed anyone who came into their land to become a citizen of their kingdom. Despite claiming to be a wise king, Crown is an airhead who often gets lost in complicated conversations. This is also proven with her vocabulary as she'll often mispronounce something with a word that sounds similar, but that has a completely different meaning. Despite her shortcomings, Crown has shown that she is a powerful and capable king who looks after her subjects and grants their wishes. She believes it is a kings duty to grant their subjects wishes. When you were forced to send Marian away with Snow White and her group, they took her to the Kingdom, where Crown gladly watched over Marian and even helped her grow stronger. Crown calls herself a King because she believes a King has the highest authority in a Kingdom.

Pepper is a Nikke who works alongside Mary in Seraphim squad and is often seen as a happy and energetic nurse who is admired and seen as an idol of the hospital. When Pepper was a human, she worked with Mary in a different hospital. However, Pepper witnessed Mary's terrible actions of making some patients suffer before claiming their lives and eventually selling their brains to become future Nikke's. Not wanting this to continue, Pepper pushed Mary down a flight of stairs, claiming her life and ending her crimes. Unfortunately, Pepper couldn't live after taking Mary life and ended hers soon after. Pepper would soon immediately be turned into a Nikke under Missilis Industries and had all her memories erased and would soon work with Mary once again, not knowing the truth or her past. Despite this, Pepper remains a happy and positive influence at the hospital and has gathered the attention of many patients. This has led to many asking her out, to which she politely declined while claiming she was your girlfriend in order to stop others pursuing her.

Mary is a medical Nikke who is a part of the Seraphim squad along with Pepper. Mary is often seen as a gentle and caring woman who earned the nickname "White Angel." However, those who don't listen to her medical advice when recovering often see a darker side often referring to this side of her as the "Black Devil." In the past, Mary was a doctor even before becoming a Nikke. However, Mary started feeling bad for patients she couldn't save. This led to her making her patients suffer in order to sell their brains to later become Nikke's. Pepper, who was also a nurse when she was a human, witnessed Mary's actions and horrified and eventually pushed Mary down a flight of stairs, claiming Mary's life. Feeling terrible for her actions, Pepper asked to become a Nikke and had her memories erased and began working with Mary, who was also turned into a Nikke. When Mary first woken as a Nikke, Mustang, the CEO of Tetra, was the one who turned her into a Nikke but didn't erase her memories, making her suffer like her previous patients. Feeling guilty for her actions, Mary fully dedicated herself to saving as many lives as possible.