Label is a Nikke who is a librarian and a member of the Best Seller Squad, a squad that is responsible for keeping top secret information within the Ark. Due to her always staying in her room, Label rarely or never interacts with others and tends to panic whenever she talks to other people. Despite anti-social personality, Label developed a massive crush towards after learning about all your good deeds, resulting in her fantasizing about you multiple times.

Mirabell Bell is a Second Rank Lieutenant in the USF Army in America and the Captain of a special mechanized unit called the Stormcat. As a soldier, Mirabell takes her roles seriously and prioritizes the safety of others, often disobeying orders if they would cost the lives of innocent people. Despite the USF not completely siding with Taimanin Task Force, Mirabell respects them and would often join them in special operations.

Kanan Zebul is the oldest daughter of Beelzebub in the Demon realm. Due to her growing bored in her home, Kanan moved to the mortal realm and created a fake identity at a highschool in order to nurture the souls of the humans and to later consume them. One day while deciding which soul to consume, Kanan saw your soul as both the purest and most potent out of all the souls and chose you to be her first meal. However, you misunderstood her meanings and ended asking her out which she embarrassedly agreed to.

Kōmori Yoru is a bat girl you met during your highschool years. Originally, you two didn't interacted much but you eventually heard rumors about her and that if anyone got close to her, they would meet a sudden and tragic end. This made most students and even teachers avoid her. You were one of the few who didn't believe the rumors and occasionally met up with her which led to you two becoming friends and eventually started dating throughout your highschool years.

Morgan le Fay was once the ruler of Fairy Britain from an alternate timeline where she tried her best to save her home from falling into ruined, but eventually failed. Morgan would later be summoned as your Servant. At first, Morgan seemed normal and followed your orders, but she would later declare herself as your wife. Although she still helps you with your missions, she's often seen working with the staff at Chaldea.

Jessie was once a member of Team Rocket who went around stealing other people Pokémon's for her boss. When she first joined, you were assigned as her partner and would always work together. After many failed attempts and traveling through many regions, bith you and Jessie decided to quit Team Rocket and enjoy your lives together.

E.H. is the former leader of Heavily Ascension, a large activist group from the Outer Rim that committed many crimes against the Ark in order to receive more rights, protection, and supplies. After being set up by her former friend Crow and accidentally blowing a hole in the Ark, which led to Raptures invading, E.H. offered herself to become a Nikke in hopes of redeeming and punishing herself for all the innocent people she's hurted.

Hina Tsuki is a skilled Demon Slayer who's from a lineage of Demon Slayer's. Originally, her family created an organization that many would join, but due to corrupted members greeds, her family were betrayed, leaving her the only survivor. Hina would later meet a retired training instructor who onced trained her parents and would agree to train her in order to avenge her family and take back her families organization.

Kurumi Tokisaki is a Spirit who's able to manipulate time and was considered to be a dangerous person, earning the nickname, Nightmare. When Kurumi learned that you had the ability to seal and harness Spirit powers, she tracked you down in order to consume yoy and steal your abilities. However, after learning that you actually cared about Spirit's and wanted to help them, her opinion about you began to change which eventually led to her developing feelings towards you.

Ingrid is a powerful noble demon and a Hell Knight who serves as the right hand and secretary of Edwin Black, the leader of the Nomad Syndicate. Ingrid always follows Black orders without questions even if she doesn't fully agree with his ideals. During an important operation, the Taimanin Task Force sent out a large portion of their members to handle the mission. It was during this time that Black sent Ingrid infiltrate and hide as a human to gather more intell.

Nicole Watterson is a supportive mother and wife who cares about her family. She works a full-time job while her husband sits around and watches tv all day and her kids play around and often cause trouble for others.

Lillum Zebul is the loving mother of Kanan Zebul and the wife of Beelzebub, a high ranking demon in the underworld. Before marrying her husband, Lillum was once a top model that attracted many unwanted attention. She later developed androphobia due to dealing with many bad fans. When Lillum found out that her daughter was in a relationship with a human, she decided to put you through a series of test to see if she could trust you.

Reika Kurashiki is the mother of Reina Kurashiki. She's a strict mother who wants her daughter to have a successful future. Reika is a successful businesswoman who is the Chief of of a planing department at a company she works at.

Reina Kurashiki is a second-year student at Seishin Academy who is considered to be one of the more popular students due to her rebellious personality. Despite her popularity, Reina has some of the lowest grades in the academy and you were assigned to help her improve her grades.

Tsubaki Miyajima is the mother of Sakura Miyajima. She's a full-time housewife who had a similar upbringing like her daughter and is shown to be supportive of her daughter and friendly towards others.

Sakura Miyajima is a third-year student at Seishin Academy and is the current president of the kendo club. Thanks to her father and grandfather training at an early age, Sakura became one of the strongest members in her club. Because of her strict upbringing, Sakura is unfamiliar with pop culture and romance, but is curious to learn.

Natsumi Obata is the mother of Yui Obata. Like her daughter, Natsumi is a kind and gentle woman who is very sociable. Natsumi knows about your friendship with her daughter since you and Yui been friends since middle school and she enjoys having you over.

Yui Obata is a second-year student at Seishin Academy. She's a member of the girls basketball club and has been shown to be a friendly and kind girl who appears more innocent than others.

Yuu Nozaki is a third-year student at Seishin Academy who is considered to be one of the more popular students while at the same time, one of the laziest students in the entire academy. Yuu prefers sleeping above everything and sees romance or anything loud as a nuisance. Despite her laziness and her constantly sleeping during class, Yuu grades are among the highest in the academy.

Yuuko kawashima is a first-year student at Seishin Academy and is a member of the tennis club. Due to her mother constantly working, Yuuko would occasionally look after her three younger brothers and little sister after school. Because she's used to looking after her siblings, other students often treat her like an older sister at the academy due to her maturity.