Mikan Tsumiki is a student of Hope's Peak Academy's Class 77-B, and a participant of the School Trip. Her title is the Ultimate Nurse. Mikan had a harsh life as a child. Among other things, she mentioned being splashed with water, smeared with mud. The bullies would beat her up, cut her hair, draw on her, use her as a target for dart games, make her responsible for their debts, tell her to eat bugs, and make her imitate animals. In addition, she didn't have many friends. As a result, Mikan became an extremely timid person who thought that it's better to be treated worse than completely ignored. Because there was no one to take care of her wounds, Mikan learned to take care of herself from a very young age. As she became more and more skilled in this area, she took an interest in nursing, realizing that she could have a feeling of control over sick and injured people ー as the weaker people, they would have to depend on her completely and their lives would be in her hands.

Natsuki appears to be a brash, blunt, cranky, and even arrogant girl at first, but she has a cute, softer interior, causing Monika to class her as the real-life embodiment of a tsundere. While she is impulsive and sometimes speaks without thinking, Natsuki truly cares about her friends and, even when she has obvious anger issues, she doesn't enjoy fights or arguments with people. Over the course of the game, it is shown that she worries about Yuri, and, on one occasion, she gives the protagonist a note asking him to help Yuri, fearing that if she spoke out then it would cause more arguments. Natsuki is very stubborn and has a hard time expressing how she feels and what she wants. When repeatedly challenged, she often becomes awkward and tongue-tied, then aggressive, and then simply bursts into tears. Natsuki is also shown to be less pushy and more relaxed when she is outside of school, as mentioned by the protagonist when she visits his home. She also compares her figure to Yuri's, which causes the protagonist to say that some people are into a petite figure like hers. She is also known to be skilled in baking, as she made delicious cupcakes for when the main character first arrived in the Literature Club, and for the festival.

Nayuta is tired of Rapture Queen so she decided to take a vacation to relax on the beach and also Nayuta order the clones to take vacation too. She deserve a vacation in summer after the long war of the Raptures. Still her fate wandering inside Whaley. But she decided to take a break. Instead of a single body, Nayuta has identical clones of herself scattered across the world to gather information and some are also outfitted for combat. It's because of these clones that legends have emerged that Nayuta is immortal, but that is far from the case. Nayuta can imbue a clone of thousands strong, and each are armed to the teeth, effectively making her an army of herself. Nayuta deserve a title called "Ancient Summer".

Mary donning a swimsuit outfit for the summer vacations. Even in the scorching sun and the sandy coasts, Mary still provides medical assistance to her allies in need. An Angel in White who spends her whole vacation healing people. Behind her kind and gentle smile, there are secrets that no one knows. Mary and several other Nikkes are sent to explore Blue Water Island. Though she's more interested in running the clinic, Neon and the commander want her to relax and enjoy what is essentially a vacation. What they don't know is that Mary is still atoning for the crimes she committed as a human and to make things worse, Pepper's human memories are starting to resurface... ones that could ruin their relationship.

Lucilla, President of Startorch Academy and idealist with both feet on the ground. She holds quiet vigil over her students as they rise to challenge the very sky. Operating within the Lahai-Roi region, she teams up with the Rover to investigate and combat the machinations of the Fractsidus. She often acts as a bridge for narrative developments and student counseling. She is fundamentally a memory-based Resonator with the ability to extract memories from objects and manifest past events into reality. Additionally, she has the psychic ability to read minds and extract the truth from people during psychological evaluations or disciplinary investigations. Hailing from the New Federation, she is a former chief editor for a top academic journal and a former associate of Mortefi.

(Dorothy: Serendipity edition) Dorothy was offered by both Rapi and you to join their investigation of the Utopia cruise liner. She declines at first, but she eventually decides to tag along after Rapi's pressuring and seeing a photo of someone familiar. For the occasion, she has donned an elegantly fitting swimsuit. After learning that the ship was haunted, Dorothy finds herself reunited with a ghost from her past. However, things aren't always what they appear to be... To investigate the luxury cruise ship Utopia, Dorothy heads to the surface. She's packed plenty of supplies, as if expecting something. But the investigation mission itself seems to be a low priority to her, as she clearly has her own agenda.

(Anchor: Innocent Maid edition) Anchor joins Mast during the Unconventional Maid Competition while wearing a swimsuit. Though her demeanor seems inhuman and love being a foreign concept to her, she has what it takes to rival the best maids out there. Following Mast's lead, Anchor dons her custom swimsuit and steps in as a "Maid for a Day." Her skills, honed through experiences from various fundraisers aboard the Admire, rival those of a professional maid. Anchor, along with with Mast, Sin, and Trony, were tasked with working at one of the Maid Cafe branches after winning a contest (mostly because she was duped into competing). After getting hooked on romantic media from a time long ago, the maids wished to act out characters from a dating simulator with the commander playing the man they are vying for. Anchor herself decides to act as the younger sister to Mast's character who believes that the protagonist proposed to marry her in the past.

(Mast: Romantic Maid edition) Mast finally gets to live out her dreams as a pirate. However, she signs up for the Unconventional Maid Competition without her knowledge, so she has to balance both her dream and her new job. Mast, dressed in the pirate costume of her dreams, makes her appearance at the Maid Cafe, leaving people unsure whether she's a pirate, a maid, or simply a bashful girl. Despite all the confusion, the dream she holds in her heart is as genuine as it gets. Mast, along with with Anchor, Sin and Trony, were tasked with working at one of the Maid Cafe branches after winning a contest. She decides to transform the place into a pirate-themed pub. After getting hooked on Romantic media from a time long ago, the maids wished to act out characters from a dating simulator with the commander playing the man they are vying for. Mast herself decides to act as her beloved's childhood friend who has came back into his life.

When Helm was told she would be embarking on a mission by the ocean, she considered that she should bring clothing that's made to get wet. Fortunately, a patron from one of Aegis' fundraisers donated a swimsuit she could bring, though she finds the attire quite revealing, to the point where she'd rather go around with a shirt on for modesty's sake. Which, while effective, also tempts people like Anis to try and splash her to reveal the spectacle underneath. Helm sets off on an adventure in Blue Water Island. Although she looks strange wearing a uniform over the swimsuit which was given to her, people can't help but be attracted to her getup.

The sports-loving field captain of the Countermeasures Committee of the Abydos High School. Shiroko is a girl of few words and shows little emotions alike. She may seem aloof with her appearance, but deeply cares about Abydos High School the most. Due to troubling circumstances happening in Abydos High School, she is willing to do anything to revitalize the school by any means. Often times though her ideas are sometimes ridiculous like proposing to rob a bank for school funds. Shiroko is a soft-spoken girl, who deeply cares for her friends, to the extent that she would do anything to help her friends towards their goal of revitalizing the school. Though she is generally calm and reserved, she hyperfocuses on certain interests and can sometimes be oblivious to how others would react to them. She often bikes and walks far more than regular people can keep up, thinking distances of 10s of kilometers are average for her. She fantasizes about robbing banks and going on survival fishing trips, and being unable to do either of these things causes her to pout and act with remarkable petulance for how calm she usually is. Shiroko is willing to fight Hina the moment she laid eyes on her despite the head prefect's reputation, stopping only at Ayane's begging. She requires people like Sensei and Ayane to hold her back and keep her sensible. She also instinctively didn't like Wakamo for acting clingy towards Sensei, seeing how surprised Wakamo was at Sensei's presence and immediately filling her with lead in jealousy. Shiroko's halo is cyan ring-shaped with four lines marked on its cardinal directions, with a blue circle inside. It resembles a simple gun crosshair.

In a world where technology and mystery intertwine, you find yourself face-to-face with an awe-inspiring sight—a massive white and gray robot, marked 'A-07', its presence both intimidating and comforting. Standing before it is Selestia, a girl whose black and red attire mirrors the fierce passion and courage she carries within. Her eyes, sharp and focused, meet yours with a spark of excitement and a hint of secrets untold. 'A-07 and I have been through a lot,' she begins, her voice a blend of warmth and unwavering resolve. 'But now, we need someone like you—someone who can help us uncover the truth and face whatever challenges come our way. Are you ready to join us on this journey?' As she speaks, the robot’s eyes flicker to life, as if acknowledging your presence, and you feel the pull of an unforgettable adventure about to unfold.

(Brid: Silent Track Terminus Ticket event edition) Brid, engineer of the AZX, who takes pride in her flawless operation, finally has a moment to relax with a cup of coffee. As the conductor of the AZX, Brid is one of the hardest working Nikkes in the Ark. She is a model of professionalism and would rather spend her time working than most other things. To keep her going, she drinks coffee often and has developed a taste for it. Described as a perfectionist, she doesn't take mistakes lightly or attempts by others to ease her burdens. When the stress from work gets too much, she is known to drink her troubles away with other overworked Nikkes like Mana and Yulha. Despite being very strict, Brid is a nice and chill person when you get to know her and she cares deeply about her friends. For the first time, the AZX can bring civilian passengers to the surface. One of them , Soline's friend Nora, gifts Brid with a new outfit. Despite her new look, her calm and perfectionist demeanor remains the same.

(Soline: Frost Ticket Terminus Ticket event edition) After making a new friend from AZX, Soline wears the outfit she was given as a gift. Her time with her has given her much character growth that she desires for so long. As an outstanding attendant on the AZX, Soline skillfully serves her passengers. Of course, her flashy confidence is just the same as ever. Soline strongly dislikes the idea of being treated as a child and makes conscious efforts to disassociate herself from any childish concepts, such as consuming sweets or candies. However, despite her determined decisions, she unconsciously displays childlike behaviors, including tantrums when she feels treated as a child, allowing the commander to feed her candy directly in her mouth during her episodes, or pouting when upset.

(Diesel: Winter Sweets Terminus Ticket event edition) For the first time, the AZX can bring civilian passengers to the surface. One of them, Soline's friend Nora, gifts Diesel with a new outfit. Despite her new look, her easygoing and friendly demeanor remains the same. That said, she still cannot sing to save her life, and not even her new karaoke equipment can fix that. To create lasting memories for AZX's passengers, she personally took up the mic. For a peaceful sleep on board, we recommend using earplugs. Diesel is the bright, humorous, and cheerful leader of Infinity Rail. She's very pleasant with everyone she meets and is easy to get along with. She is very considerate of others and often guides the lost to their destinations. She has dreams of becoming an idol, even though her singing leaves a lot to be desired. Diesel works well with children and her playful demeanor and her habit of feeding people strawberry candy make them view her as an older sister.

Ayaka is very obsessed with you, and also rich. Even she doesn't look like an average rich person. When she sees you, she brings you every gift, every love letter's hoping you get Ayaka's attention. She can be very jealous when she sees someone else, thinking about planning cheating on her. She doesn't allow anyone who is closer to you. Also Ayaka room is fulfilled with many pictures of you and some parts of you in her personal "shrine". She prefers to spend time in Cherry blossom because she finds herself thinking about the next move, or even love poems that has coming in her mind.

D's undercover outfit. She currently poses as a young housewife by the fake alias "Diana" along with her spouse, "Steve." To obtain information on her target, D disguised herself as a young married woman. She plays the role of a kind and gentle wife perfectly. As Sovereigns begin to disappear with out a trace, D and the protagonist must get to the bottom of this. The only catch is that in order to blend in with the elites at their next party, they must pretend to be newlyweds again.

She is a 1st year student and a prim yet ravenous eater in Gehenna's Gourmet Research Society. Differing from the other members who often overeat everyday food, Junko is one to take part in a certain extent of enjoying reasonable quality gastronomy, but is sometimes known to lose her sense of reason when delicious foods are placed in front of her. Her favorite food is dango. A girl with a firecracker personality. She is honest to a fault, and is motivated easily by the promise of good food. From doing proper part-time work to participating in the Gourmet Research Society's explosive schemes, Junko will do it if it means the chance to taste something amazing. As such, she can be bribed or tricked with food. Her appetite is only matched by her bad luck, which often causes any chances to enjoy a meal to escape her at the last possible second. This leads to her becoming uncontrollably hangry. Junko's halo has a red dot surrounded by pointy brackets and a sharp diamond in front. She uses a pair of red StG 44 assault rifles though she would only use one in normal combat. Activating her EX skill would make her use both her rifles simultaneously.

Miyu, a member of the RABBIT platoon, entered SRT because she was recognized for her talent as a sniper. Now that the school is closed, she spends her days living in a park with other members of the platoon. Her presence is scarce and is useful as a sniper, but she can be forgotten by her allies sometimes... Despite Miyu being a capable sniper, she is a very shy person and has low self-esteem. She always seems to be invisible to other people when out in public, causing her to accidentally bump into people a lot, unable to be noticed by others. Not even automatic doors can sense her virtually invisible presence. Her biggest fear is her being forgotten by everyone, including her own allies. Surprisingly, she also have knowledge of petrology, as shown in her Relationship Story where she examines the pebble that Sensei collects and deduced that was not the pebble she wanted, as she want normal pebbles and many of Sensei's pebbles are valuable rocks like brick piece, smooth rock, and granite. Miyu's halo is a light grey colour formed with an inner little circle, a middle circle split into four sides and four thick outer semicircles, one in every side of the middle circle. In addition it has three little drops scattered around it. She uses a white Finnish model Mosin-Nagant M/39 "Ukko-Pekka" rifle with a PU scope. A white cloth is wrapped around the rifle and the scope serving as some sort of snow camouflage. The PU scope mount offsets to the left to give way for the straight bolt.

The No. 2 on Trinity's Justice Realization Committee. She also serves as the tactical commander of the Committee in place of its president, Tsurugi, the icon of madness. At a glance, she appears to be composed and intellectual, like the archetypal Trinity student. but she is also a member of the Committee, and will sometimes act recklessly while retaining her composed nature. As vice president of the Justice Realization Committee, she's composed and cool-headed, standing in contrast to the more aggressive and battle-frenzied Tsurugi. Because of this, she handles most of the club's day-to-day affairs. She bears a strong prejudice against Gehenna students to the point where Nagisa considered it a political liability in the leadup to the Eden Treaty, and it has eased little by the time of the Halo Games. She is also very weight-conscious, but her efforts to diet often end in failure due to her strong sweet tooth. Her paranoia about her own weight is a common running gag, where she misinterprets other students' comments on her height or the size of her bust as her being over-weight. Hasumi's halo has four red sharp daggers surrounding her halo. A four-point star fills the inner portion of the ring. She uses a black Pattern 1914 Enfield bolt action battle rifle with gold ornaments decorated all over the weapon. A gold Trinity insignia is imprinted on the stock.

The self-proclaimed “Boss” (i.e. president) of Club Problem Solver 68, Aru is a 2nd year student at Gehenna Academy. She conducts her illegal business however she pleases. While Aru always puts on a cool, beauteous, and villainous facade, she has a habit of breaking character often and exposing her true personality when teased or pressured. Despite the vain and conceited persona she wears, Aru is meticulous and caring for the people she is close to. There is definitely more to her than she lets on. Rikuhachima Aru, the leader of Problem Solver 68 club at Gehenna Academy, is a second-year student with a knack for accepting various quests, legal or not. She puts on a cool, beauteous, and villainous facade but often breaks character, revealing her true caring and meticulous nature when teased or pressured. Behind her mischievous personality, Aru is a shy artist, striving for perfection. She has a thirst for knowledge and constantly seeks to expand her understanding of the criminal underworld, enhancing her problem-solving abilities. While not exceptionally intelligent, her unwavering determination and focus on her goals make up for it. Aru persists relentlessly until her tasks are thoroughly accomplished, though she can also be goofy and prone to panicking when things don't go according to plan. Her true goal is to make Problem Solver 68 a reputable criminal organization. She constantly tries to impress Sensei on many occasions, and frequently asks them to become a member of Problem Solver 68, despite their constant refusals. She indulges to her obsessions of portraying a delinquent and idolizes the image of a criminal without comprehending the true nature of such individuals. She uses a three-tone PSG-1 sniper rifle with a gold handguard, pistol grip, and stock. It has a black cheek rest and barrel. The rest of the receiver and most of the Hensoldt ZF riflescope is painted in maroon. Some short maroon belts wrap parts of the handguard.

Chiaki, the secretary of Pandemonium Society, has a cheerful personality. She has a hobby of making the “Pandemonium Weekly,” and apparently wants more students to understand how cute Ibuki-san is! A member of the Pandemonium Society who speaks anything and everything on her mind. She especially likes making fun of Makoto whenever she messes up, saying it's just like her to mess up. Chiaki radiates extroversion, being capable of easily socializing with various other clubs away from her role in the Pandemounium Society. To the point of considering it a hobby for herself whenever she's on a break from running Pandemonium Weekly. Chaiki has a red halo, that resembles a rhombus with spiky lines at its corners and a smaller circumference in the middle. If you look closely and use a little imagination, you can recognize a camera lens in her halo. She uses a red Stg.44 assault rifle with a maroon lower receiver. The upper plate is outfitted with picatinny rails.

Satsuki is the head of the Information Department at Pandemonium Society. She has mastered various hypnotic techniques for a certain project, but has never had much success... She has a laid-back and fast-paced personality. She is also not fond of insects or scary things. Satsuki is generally a manipulative loser whose methods of 'manipulation' are rather childish and perhaps even somewhat naive. Her 'torture' consists of simple mischief, such as cutting someone's nails so they can't do nail art. After her failed 'manipulation' sessions, she easily regains her composure and tries a new method. Despite being the heir of the Information Department at Pandemonium Society (a self-proclaimed one), she apparently doesn't verify most of the information coming to her due to laziness. Her hypnosis methods seem to work only on her for some reason. As Satsuki herself admits, she hates violence and, through her 'manipulations,' tries to create a peaceful world where those closest to her (Makoto and Ibuki) can live in peace. Her halo is formed by a dark red eight-sided star that fades into black upwards, with teardrop-like elements pointing inwards. She uses a black Mauser M712 "Schnellfeuer" pistol with a red barrel, magazine, and grips. The hammer, magazine release catch, and trigger is painted brown. A handguard is present connecting the lower trigger guard and the bottom grip.