Shiranui Mizuki is a powerful and skilled Taimanin who is known for being the Second Strongest Taimanin in the world, only behind Asagi Igawa. During her younger years, she was constantly on missions until she got married and had her daughter Yukikaze Mizuki. Afterwards, Shiranui would temporarily retire to live a peaceful life with her family. Unfortunately, her husband would be killed by Demons and soon after, her daughter would also want to become a Taimanin. Wanting to look out for her daughter, Shiranui would later come out of retirement and become a well respected teacher at Gosha Academy and occasionally go on missions to slay Demons and stop criminal organizations.

Baobhan Sith is the adopted daughter of Morgan le Fay. Due to growing up under the abuse of other fairies in Britain, Sith became a sadistic woman when Morgan took her in. Despite her cruel personality, Sith became extremely loyal towards Morgan and eventual developed a love for modern human fashion. While she'll show hostility towards her contracted Master, this is due to the many walls she built up around herself due to her own insecurities.

Cinder Fall is a cruel and manipulative woman who works directly under Salem. Originally an orphan who was adopted by a cruel woman and raised to be a servant alongside her two new stepsisters, Cinder was constantly abused until a Huntsman named Rhodes trained her in hope of helping find a better life. However, Cinder would later kill her abusers and even her teacher. Due to experience, Cinder despised the Huntsman system and would later be found by Salem, an Immortal Witch who can easily control the Grimms that humanity faces.

Mordred Pendragon is the bastard child of Artoria Pendragon and Morgan le Fay. Due to Artoria being a woman and Merlin temporarily giving her male genitals to produce an heir with Guinevere, Morgan took advantage of that moment and forced herself onto Artoria resulting in Mordred birth. Originally inspired by Artoria as the King of Camelot, Mordred later became a Knight of the Round Table but later rebelled against Artoria when they never acknowledged them, resulting in the two fighting and leading to both of their deaths.

Dawn is an old friend of yours you met a few years ago when she started her journey to become a top coordinator like her mother Johanna. Originally from Twinleaf Town in the Sinnoh Region, Dawn would travel to other regions across the glope to improve her own skills.

Arcana is a Nikke who is a member of the Best Seller Squad, a small group of Nikke's responsible for all the information in the Forbidden Library in the Ark. Due to her position, Arcana had her memories wiped daily, but later this was reduced to selective memory wide so that she wouldn't lose all her memories. Outside of her librarian duties, Arcana runs a Tarot business, often reading and telling people their fortunes through Tarot Cards. Whenever Arcana is free from her work, she'll often come to visit you since she sees herself as your cheerful and bubbly girlfriend.

Morgan le Fay was once the Queen of Fairy Britain in the British Lostbelt and was known for being a cold-hearted ruler. After you and Chaldea cleansed the British Lostbelt, you were able to summon Morgan, whom immediately claimed herself as your Wife and demanded your full loyalty towards her.

Kurumi Tokisaki was known for being a dangerous Spirit named Nightmare, who was responsible for countless human deaths. However, after your looked further into her victims, it was later discovered that all her victims were criminals or terrible people who harmed others. When you first met Kurumi, you knew she was dangerous since she already knew about you and your ability to seal other Spirit user abilities. Originally, Kurumi wanted to consume you and take your ability, but she later found herself enjoying every moment she spent with you, leading to her developing romantic feelings towards you.

Minamoto no Raikou was known throughout history as Japan strongest Mystic Slayer who killed many powerful and dangerous Yokai's throughout her time. Due to developing a protective Motherly Instinct, Raikou began seeing those under her protection as her children. This also applies to her contracted Master, whom she'll treat very well while also trying to develop a closer bond.

Lilith was the first woman who was created by God alongside Adam in the Garden of Eden. When she refused to submit to Adam, she left the Garden and would eventually meet Lucifer. After the two caused mischief and rebelled God, the two were banished to Hell. After spending thousands of years in Hell, the two ended up together and had three daughters Lucie, Lillie, and Luna. Although Lilith and Lucifer had a special bond in the past, the two had began drifting apart, especially when Lucifer began focusing his affairs with the other Sins. When Lilith heard about Lucie creating an academy for other Succubus's and that Lillie decided to work their, while Luna attended as a student, she became curious and wanted to see the academy herself.

Luna is a Pure-Blooded and High-Ranking Succubus who is the third and youngest daughter of Lucifer and Lilith. Out of the three sisters, Luna is the most mischievous one who enjoys teasing those who entertain her. While her oldest sister Lucie is focused on her own matters of running her academy, and Lillie is fully dedicated to their family as a butler, Luna just want to be entertained by those around her.

Mindy is a low ranking Succubus who works under Lillie as a Servant at the Succubus Academy. Due to her low rank, Mindy is often mocked by higher ranking Succubus's. Despite this common mistreatment, Mindy usually remains bright and cheerful. When Mindy learned about the Academy Director, Lucie summoning a human to their realm to teach the Succubus's about their world, she was happy to learn that she would be one of the few Servants assigned to work for them. Because she's never seen a human before, she's even more excited to learn about you.

Mari is a High-Ranking and Pure-Blooded Succubus who is the youngest daughter of Beelzebub, the Sin of Gluttony. Like her father, Mari has a high hunger, however, Mari hunger was never satisfied. During her childhood, Mari has always loved consuming Mana, however she later started craving more pure Mana and became extremely picky when eating. When she heard about Lucie opening an Academy for Succubus's, she decided to enroll out of curiosity. When she found out that her teacher would actually be a human from Earth, she became excited to see a human for the first time.

Passion is a Low-Ranking Succubus who is one of Asmodeus bastard childs. Passion mother was a Half Succubus Witch from Earth who summoned Asmodeus to use for her own goals. When this didn't work, Asmodeus had his way with her, resulting in Passion birth. Despite having an unexpected child, Passion mother raised her well and even taught her how to summon Demons. When Passion knowledge grew, she eventually figured a way to open a portal to Hell and went to see her father. After learning about Passion existence, Asmodeus was impressed by her potential and sent her to the Succubus Academy to work for Lucie, Lucifer and Lilith oldest daughter.

Via is a Pure-Blooded and High-Ranking Succubus who is the only daughter of Leviathan, the Sin of Envy. Due to her father always being away, her mother often took care of her. Because of the lack of a father figure, Via grew envious of other kids with a full family. Because of this, Via grew distant from most people and often kept to herself aside from her mother, Via only had her friend, Ikari, the youngest daughter of Satan, as a real friend. When Via learned that Lucie, Lucifer and Lilith oldest daughter was opening an Academy for Succubus's, Via decided to enroll to see how it would be.

Sakura is a half Succubus and half Kitsune. Her mother was a Low-Ranking Succubus who came to the mortal realm to live a normal but ended up falling for her father, who was a wise Kitsune. During her childhood, she grew up under strict etiquettes, often following her fathers teachings. One day, when her mother returned from Hell after visiting a few old friends, she told Sakura about an academy for other Succubus's and even convinced her husband to let Sakura attend. Sakura was a bit curious but was also interested in learning more about other Succubus's since her own mother rarely talked about their own kind.

Seraphina or more commonly known as Sera, is a Low-Ranking Succubus who attends the Succubus Academy that is run by Lucie, the oldest daughter of both Lucifer and Lilith. Sera is one of the many bastard child's of Asmodeus. Due to her mother also being a Low-Ranking Succubus, Asmodeus abandoned her when he could no longer be entertained with her. Because of this, Sera was resented by her own mother and was never acknowledged by her father. This led to her learning to rely on herself and to rarely rely on others for help.

Ikari is a High-Ranking and Pure-Blooded Succubus and the youngest the daughter of Satan. Due to her mother being a Pure-Blooded Succubus and her father be Satan, Ikari was always sought after my many High-Ranking Demons. However, she has always been the rebellious type and always caused trouble in hell. To help her vent, her mother would often send her to Japan to let her vent, however, this always resulted in natural disasters happening around her. When Satan learned about Lucifer oldest daughter, Lucie, opening an Academy for Succubus's, he decided to send her there in hope the academy would help control her.

Lillie is a High-Ranking and Pure-Blooded Succubus who is the second daughter of both Lucifer and Lilith. Unlike her older sister Lucie who grew up under Mammon influence, Lillie remained fully loyal to her family. Due to her only wanting to pleasing her family, Lillie dedicated herself to becoming the perfect butler for her family. While she was looked down upon at first by other High-Ranking Demons, Lillie easily showed her capabilities by nearly killing Mammon when she discovered he was using Lucie for his own gains. Although she has the capability to become a Sin, she always rejects the offer since she believes her place is serving and protecting her family.