D4DJ

Happy Around!

The latest idol-themed DJ unit from Yoba Academy. The name comes from Rinku's catchphrase, which she habitually says whenever she is joyfully spinning around. Their primary music genre style is a combination of J-pop and dubstep. They also use happy hardcore and gabber.

• Rinku Aimoto (愛本 りんく)
• Having lived in Africa as a child due to her parents' work, Rinku finally returned to Japan prior to starting high school and currently lives with her grandparents. On her first day of school, Maho introduced her to DJ activities by inviting her to a performance by Peaky P-key. She was then inspired to create her own DJ unit alongside Maho. An optimist who can be an oddball at times, she can sense how certain musical pieces can connect by moving her body, so she serves as Happy Around!'s lead singer and dancer. Later, she deeply values her friendship with Muni, to the point she can even cry when her relationship with Muni strained. Her name is a play on the word "link".
• Maho Akashi (明石 真秀)
• A school DJ broadcaster under the name "Mash", Maho started her DJ activity after watching an outdoor concert when she was a little girl. She initially attempted to reject Rinku's DJ unit invitation until she realized how seriously Rinku is about it. She is skilled at cooking and doing housework because she has younger siblings.
• Muni Ohnaruto (大鳴門 むに)
• An illustrator and VJ under the name "VJ Only", Muni has been attracting attention on the internet thanks to her drawings. She takes her art seriously, even though she does not accept criticism kindly. She is Rinku's childhood friend, and reluctantly decides to join her unit upon being invited, but almost pulls out from her maiden appearance due to stage fright. Muni wears a rabbit-ear headband on her head and carries a cat plush called Nyochio during performances and in school.
• Rei Togetsu (渡月 麗)
• Being born to a wealthy family, Rei had lessons in all sorts of activities and she is gifted to the piano. However, her parents set strict expectations that she wishes to be freed from. She serves as the group's composer and arranger. It is implied that in the past, she also attended a similar outdoor DJ concert like Maho, though the two did not know each other at the time.

Peaky P-key

A popular hip hop-themed DJ unit in Yoba Academy. It was formed during their middle school years. Also known as Peaky, their music style is a combination of techno, hip hop, and electro-pop.

• Kyoko Yamate (山手 響子)
• Kyoko is the charismatic leader of Peaky P-key. Born in a musical family, she has a natural talent for music. She later develops an admiration for Happy Around! after she watched their first show.
• Shinobu Inuyose (犬寄 しのぶ)
• A DJ who is the brainy one of Peaky P-key. She and Kyoko have known each other since childhood, though Shinobu constantly rejects Kyoko's requests to form a unit until middle school; since then, they have maintained a close bond together. Besides being a skilled DJ, she also excels in remixing and track-making. On the outside of her DJ activity, she enjoys online gaming.
• Yuka Jennifer Sasago (笹子・ジェニファー・由香)
• Yuka is the moodmaker of Peaky P-key. She met Kyoko as she was searching for the "greatest moment" to capture with her camera and decided to join the unit as a VJ. Raised by parents who work as gym trainers, she is very cheerful and kind to everyone, and loves to cheer up her fellow group members whom she regards as her best friends.
• Esora Shimizu (清水 絵空)
• The self-proclaimed "lovely-type" member of Peaky P-key. As a natural-born entertainer, she joined the unit to bring entertainment to anyone, and is even willing to expend her own fortune to achieve her goals. She is skilled at getting people to let their guards down and speak their minds. Esora is also a childhood friend of Lyrical Lily member Kurumi.

Photon Maiden

A sci-fi-themed DJ unit working under an entertainment agency and consisting of students at Yoba. Their music style is a combination of trance, techno, and dance music.

• Saki Izumo (出雲 咲姫)
• Saki is a talented girl who excels in studies and sports. Due to having "synesthesia", she can see color in music. Despite her outstanding skills, Saki's personality looks like a doll, rarely showing emotion unless she is on the stage.
• Ibuki Niijima (新島 衣舞紀)
• The athletic leader of Photon Maiden, Ibuki has participated in many sports since childhood. In junior high, she became hooked on the joyfulness of dancing and singing and started to attend a show production school.
• Towa Hanamaki (花巻 乙和)
• Towa attends the local festivals due to her family's participation in the local youth organization. As a huge idol enthusiast, she still goes to idol concerts and tries to learn from their performances. She loves sweets, but is often scolded by Ibuki for wanting to eat high-calorie foods before performances.
• Noa Fukushima (福島 ノア)
• Noa became interested in theater thanks to her love of literature, and decided to become a performer when she was praised at a theater workshop. Very curious and knowledgeable, she becomes talkative when it comes to things she is interested in. She also kidnapped Lyrical Lily in an episode of Petit Mix, and also has an unhealthy obsession with Muni.

Merm4id

A glamorous tropical-themed DJ unit formed by first-year students at Seiho University, who aspire to become famous like Photon Maiden. Their music genre consists of electro house and progressive trance.

• Rika Seto (瀬戸 リカ)
• Holding "Life is to enjoy!" as her motto, Rika leads a positive university life. She loves to dance and sing with her friends at parties. She started her DJ activities with her best friend Marika along with Saori and Dalia whom she met by chance.
• Marika Mizushima (水島 茉莉花)
• Marika is an easygoing person who likes to comfort. Besides being a university student, she also works as a model. She was the center of attention upon entering university, but she became friends with Rika, who was able to talk to her despite all the attention.
• Saori Hidaka (日高 さおり)
• Saori started her DJ career in high school, and due to her hard-working nature, she has built up a certain level of technique. Her negative thinking held her back from DJing actively, even as a university student. Rika forced her to join the unit, but has made up her mind to change her mentality and achieve her goals.
• Dalia Matsuyama (松山 ダリア)
• Dalia devotes herself to practicing ballet, traditional Japanese dance, contemporary dance, and any other form in order to become a dancer. Also, she acts as the bodyguard of the unit.

RONDO

A gothic rock-themed group consisting of first-year Seiho University students who work at a famous club called "ALTER-EGO". Their music style is mainly a combination of trance and rock with touch of drum and bass.

• Tsubaki Aoyagi (青柳 椿)
• A born vocalist who has been humming melodies for as long as she can remember. Tsubaki was asked to join the DJ unit, which was lacking a vocalist, by Aoi, and quickly attracted attention as soon as she joined. It is implied to varying degrees that she developed a crush on Aoi due to her handsome looks and prince-like personality.
• Nagisa Tsukimiyama (月見山 渚)
• Nagisa is Shinobu's cousin who grew up in a rock music family. She came across the club where Aoi performed as a DJ when she was searching for a place to practice, and often visits Hiiro's house as well.
• Hiiro Yano (矢野 緋彩)
• The most mature member of Rondo. As a VJ, her knowledge in art allows her to build the unique worldview of the unit.
• Aoi Miyake (三宅 葵依)
• Aoi is a DJ that performs exclusively for a members-only club. She took interest in Tsubaki's singing skill and asked her to form a DJ unit.

Lyrical Lily

A lolita-themed DJ unit from Arisugawa Academy, a prestigious all-girls Catholic school. Their music style is a combination of synth-pop, house, and classical music.

• Miyu Sakurada (桜田 美夢)
• Miyu is a kind-hearted person with a good conduct. She started her DJ activities when she came across some analog equipment with her friends. She loves singing, and is well-versed in popular songs from the Showa era as well as nostalgic music due to her family's influence.
• Haruna Kasuga (春日 春奈)
• Haruna is an earnest girl who belongs to her high school's disciplinary committee. Her soft nature always gets her involved in all sorts of trouble.
• Kurumi Shiratori (白鳥 胡桃)
• Kurumi is Esora's childhood friend. She is a cheerful girl who loves fun stuffs and is bored of attending a strict school for children of rich and prestigious families, Kurumi always looks for the ways to create some kind of mischief.
• Miiko Takeshita (竹下 みいこ)
• Like Kurumi, Miiko is a cheerful girl who loves to make friends, play and she also loves her fellow members of Lyrical Lily. She has a dream about traveling all over the world and making friends in many different countries, demonstrated by her ability to understand English. However, she is also passionate to the pranks caused by Kurumi and often she helps Kurumi to prank the others, including Haruna.

Call of Artemis

A former high school DJ unit that disbanded prior to First Mix, due to creative differences.

• Airi Amano (天野 愛莉)
• Airi is a waitress working at the Cafe Vinyl. Eight years prior to the start of the series, she was part of a DJ unit group consisting of herself and three other members. When the four split, she later joined Mana to form Scarlet Canary.
• Mana Kase (嘉瀬 茉奈)
• Mana is a former member of a DJ unit consisting of herself and three other members.
• Shano Himegami (姫神 紗乃)
• Shano is a former member of a DJ group consisting of herself and three other members. She is now working as a music producer and is a person who founded Photon Maiden.
• Tōka Takao (高尾 灯佳)
• Tōka is a former member of a DJ group consisting of herself and three others. She later joins Shano to form Lynx Eyes.

UniChØrd

A pop-house DJ unit formed by Michiru Kaibara at the request of Lumina Ichihoshi. Their cosmic aesthetic is relatively close to Photon Maiden's, however, with a lighter and more cheerful style. Although queer or vaguely queer characters have been in the franchise before, this is the first unit to include members who are in an openly lesbian relationship.

• Michiru Kaibara (海原 ミチル)
• Michiru is an independent DJ player and the childhood friend of Shinobu prior to Shinobu's involvement in Peaky. She aims to best Shinobu and tends to have weird and overreacting expressions. Michiru is later invited to form a unit consisting of herself and three other girls, becoming the DJ for the unit.
• Lumina Ichihoshi (一星 ルミナ)
• A popular virtual singer who invites Michiru, Kokoa, and Hayate to form a DJ unit with her. She later reveals herself to be an AI, her data being based on the deceased singer Aria. She is later given a robotic humanoid body to live in.
• Kokoa Shinomiya (四ノ宮 心愛)
• A sharp-tongued first-year honors student at Arisugawa Academy who is invited to form a DJ unit consisting of herself and two other girls. She holds a grudge against Michiru for something she did to her in her past. She is in a romantic relationship with Hayate.
• Hayate Tendo (天堂 はやて)
• A poetic first-year student at Arisugawa Academy who has a habit of saying what's on her mind. She is invited to form a DJ unit consisting of herself and two other girls. She is in a romantic relationship with Kokoa.

Abyssmare

A gothic-themed American DJ unit backed by Sho Mitsuhashi that will go up against the DJ units of Japan. They are referred only by first name, and their real names or last names are yet to be revealed.

• Neo (ネオ)
• The cool-headed leader and vocalist of Abyssmare. A musical prodigy since she was young, Neo was scouted by Sho to help her achieve her dream to become the world's greatest vocalist. She is the daughter of Aria, a deceased singer whose voice inspired Airi Amano to follow her path.
• Sophia (ソフィア)
• The mood-reader and DJ of Abyssmare. She has low self-esteem due to her poor upbringing to the point where she almost committed suicide. She would later develop an unhealthy obsession with Neo after her voice allegedly saved Sophia's life.
• Elsie (エルシィ)
• The dancer and chorus, as well as the self-proclaimed "number 2" of Abyssmare. A cunning and intelligent woman despite her petite stature, she also has a group of bodyguards that wait on her command. She often gets into arguments with Weronika.
• Weronika (ヴェロニカ)
• The dancer and subvocal for Abyssmare. In spite of her short temper, she is shown to have a soft spot towards children, especially her younger siblings. She has strong one-sided rivalry with Neo and often gets into arguments with Elsie.

A Bad Cynic Doggo

A spin-off unit appearing in D4DJ Groovy Mix. They were first introduced in A Bad Cynic Doggo VOL.1. They mostly perform in Club DOGHOUSE.

• Eimi Azai (浅井 詠実)
• [13]
• While her knowledge of music is just barely average, her impertinent and foul-mouthed nature is on another level. She is skilled at stirring up others, her vocabulary consists of wide range of words from academic vocabulary to internet slang, and she is always spouting inappropriate remarks. Due to her subservient personality, Eimi dislikes and has a one-sided inferiority complex towards the sparkling Yoba Academy, and especially Rinku Aimoto.
• Bell Bessho (別所 美鈴)
• Bell's father is the owner of Club Dog House. Having helped out at the club ever since she was young, Bell knows how to handle DJing and sound equipment as well as creating promotional materials and merchandise. She is always smiling, but very strict when it comes to money and expenses.
• Shika Shimazu (島津 詩歌)
• A talented musician ever since she was young, Shika gained some recognition as a turntablist. However, as she started fully devoting herself to music, she ended up becoming even more lost and obsessed with all sorts of subcultures. She is a closet fan of Kyoko Yamate.
• Date-chan (伊達ちゃん)

EGOEGG

EGOEGG is an all-female DJ group in the Dig Delight Direct Drive DJ franchise. They were first introduced on the DIGGLER'S HIGH official sites.

• Hare Kanda (神田 はれ)
• An overbearing, self-centered, and perpetually hungry unemployed woman. During her high school days, she encounters a DJ and decides to form the unit EGOEGG. After a three-year hiatus, she sets out to revive the unit. She hates when things don't follow her pace and is notorious for having a harsh and curt way of speaking and treating others.
• Raika Shiodome (汐留 ライカ)
• A young and haughty college student with an intense need for approval. A former child actress, she's all for being appreciated and fawned over. Due to her high pride, she can't be satisfied unless she's number one in everything. However, she's very easy to provoke, leading to her constantly butting heads with Hare.
• Jiu Tanimachi (谷町 慈雨)
• A laid-back and easygoing gyaru with a knack for lying. She has an elusive nature that makes her quite hard to read. She follows a personal philosophy that as long as she's having fun in the moment, then that's all she needs. Though she presents herself as a "battle junkie" who constantly craves intense, all-out clashes, in reality, she's a "defeat fanatic" who gets off on taking losses.
• Mikumo Ichinohashi (一ノ橋 美雲)
• A mysterious woman working as a professional novelist. She longs to have equal relationships with people, though she tends to be excessive with physical affection. Even so, she can be quite bold and forward, and often surprises those around her.

Other characters

• Ryujin Kofune (小舟 柳人)
• Ryujin is the bartender and owner of Cafe Vinyl. Eight years prior to the start of the series, he was part of the DJ group LM.O., consisting of himself and four other members, including Shinobu's grandfather.
• Dennojo Inuyose (犬寄 傳之丞)
• Dennoji is a former DJ and former member of the DJ group LM.O. consisting of himself and four other members. He is also Shinobu's grandfather and served as a big inspiration for her.
• Ku Mitsuhashi (三橋 空)
• Ku is the son of Sho Mitsuhashi, a former member of the DJ group LM.O, as well as the first host of the revived D4 FES.
• Haruki Kaibara (海原 ハルキ)
• Haruki is a DJ and former member of the DJ group LM.O. consisting of himself and four other members. He is also Michiru's uncle.
• Masaki (真咲)
• Masaki is the general manager of Alter-Ego, the nightclub that RONDO regularly performs at. Her past, as well as her connections to other people, are a mystery to even the members of RONDO.
• Laura Bradley (ローラ・ブラッドリー)
• Laura is an English-speaking American DJ maker who befriends Saori on the internet and is the one who offers Saori to make a joint DJ music collaboration.

Anime

An anime television series titled D4DJ First Mix was first announced in 2019.[15] The series was animated by Sanzigen and directed by Seiji Mizushima.[16] While the first episode had an early debut on October 22, 2020,[17] the series officially aired from October 30, 2020, to January 29, 2021, on Tokyo MX, BS NTV, and other channels. Happy Around! performed the opening theme "Guru Guru DJ TURN!!" (ぐるぐるDJ TURN!!), while Nana Mizuki and Raychell performed the ending theme, which is a cover of "WOW WAR TONIGHT ~Toki niwa Okose yo Movement~" (WOW WAR TONIGHT～時には起こせよムーヴメント～) by H Jungle with T.[18]