Yume Nijino (虹野ゆめ, Nijino Yume)Voiced by: Miyu Tomita (speaking voice), Sena from AIKATSU☆STARS! (singing voice)The main protagonist, Yume is a first year middle school student who has recently entered Four Star Academy with her best friend Koharu Nanakura with the goal of becoming part of the top idol unit, S4, a goal which came to fruition after attending the concert of S4's Hime Shiratori, of whom Yume is a big fan. While Yume's singing and dancing are still lacking, her energy and hard-work more than makes up for it. Yume also owns a hidden power that on special occasions allows her to perform above her limit, which has garnered her interest from the academy's headmaster. In Episode 3, it is revealed that before transferring to Four Star, she was a member of the volleyball club, and in Episode 12, that her parents own a confectionery shop. Yume has a complicated relationship with the leader of M4, Subaru Yuuki. While Yume initially disliked him for teasing her, such as calling her "boiled octopus" due to her red face, she quickly befriended him. A Cute type idol, her theme color is pink, her preferred brand is My Little Heart, and she is a Flower Song Class student.
Rola Sakuraba (桜庭ローラ, Sakuraba Rora)Voiced by: Ayaka Asai (speaking voice), Rie from AIKATSU☆STARS! (singing voice)Rola is Yume's classmate, as well as her rival and first friend at Four Stars outside of Koharu. Rola comes from a long line of musicians, with her father being a violinist and her mother being a pianist. With her family's pride on the line, Rola is determined to become the top Flower Song student and earning herself a spot in S4. She is caring and has a strong sense of justice, but hates losing and can sometimes act before thinking. A Cool type idol, her theme color is blue, her preferred brand is Spice Chord, and she is a Flower Song Class student.
Koharu Nanakura (七倉小春, Nanakura Koharu)Voiced by: Megumi Yamaguchi (speaking voice)Yume's childhood friend and roommate. She is quiet, gentle, and demure, but is always willing to lend a hand to those in need. Koharu is a big fan of Yozora Kasumi, which developed after Yozora helped her with her glasses and complimented Koharu's skin,not unlike Yume's adoration for Hime. She also holds a love for candy, carrying large amounts of candy with her at all times and offering them to others. A Sexy type idol, her theme color is purple, her preferred brand is Romance Kiss, and she is a Moon Beauty Class student.In episode 30, due to her father's work, Koharu leaves Four Star Academy and moves to Italy.In Season 2, Koharu returns and enrolled into Venus Ark by Elsa.
Ako Saotome (早乙女あこ, Saotome Ako)Voiced by: Natsumi Murakami (speaking voice), Miki from AIKATSU☆STARS! (singing voice)Debuts in episode 6 of the anime. Ako is Yume's classmate. She is highly and rightfully confident in her abilities as an actress and at first sight seems to be calm and collected, but is actually easily flustered, temperamental, and has a tendency to act like a cat and attack people when angry. She appears to have a rather obsessive crush on Subaru Yuki, a member of the top male idol unit M4, and becomes jealous towards other girls who interact with him (namely, Yume). A Pop type idol, her theme color is lime green, her preferred brand is Shiny Smile, and she is a Bird Theatre Class student.
Hime Shiratori (白鳥ひめ, Shiratori Hime)Voiced by: Minami Tsuda (speaking voice), Ruka from AIKATSU☆STARS! (singing voice)An S4 member and Yume's favorite idol. Kind and elegant, Hime has been in the entertainment industry since she was young, earning herself experience in various fields such as modeling, dancing, and acting, but her true talent lies in singing, in which she is described as having an angelic voice. It is revealed in Episode 11 that she is sensitive to the low pressure when it is raining, causing her to become extremely lethargic. She is aware of Yume's special ability, which often leads her into confrontations with the headmaster out of concern. A Cute type idol, her theme color is pastel blue, her preferred brand is My Little Heart, and she is a Flower Song Class student. In Episode 27 it's revealed that Hime's My Little Heart top designer.
Tsubasa Kisaragi (如月ツバサ, Kisaragi Tsubasa)Voiced by: Sumire Morohoshi (speaking voice), Nanase from AIKATSU☆STARS! (singing voice)An S4 member and the student council president. She has a cool personality, but is compassionate and reliable, thus making her popular among underclassmen. In Episode 3, she reveals that she originally auditioned to be a Flower Song student but switched to the Bird Theatre Class after meeting Hime. She initially believes that idols shouldn't need to depend on others, and befriended a wild owl in order to cope with her loneliness before the school forbid her from seeing it, but soon comes to learn the importance of friendship after discovering that the owl now has a family. A Cool type idol, her theme color is red, her preferred brand is Spice Chord, and she is a Bird Theatre Class student.
Yuzu Nikaidō (二階堂ゆず, Nikaidō Yuzu)Voiced by: Azusa Tadokoro (speaking voice), Kana from AIKATSU☆STARS! (singing voice)An S4 member, but a year younger than Hime, Tsubasa, and Yozora. She is unpredictable and free-spirited and described as a dancing genius. A Pop type idol, her theme color is yellow-orange, her preferred brand is Shiny Smile, and she is a Wind Dance Class student.
Yozora Kasumi (香澄夜空, Kasumi Yozora)Voiced by: Ayaka Ōhashi (speaking voice), Miho from AIKATSU☆STARS! (singing voice)An S4 member. A top model, Yozora is a charismatic, big sister-type person who actively cares for her juniors. A Sexy type idol, her theme color is indigo, her preferred brand is Romance Kiss, and she is a Moon Beauty Class student.
Mahiru Kasumi (香澄真昼, Kasumi Mahiru)Voiced by: Yume Miyamoto (speaking voice), Kana from AIKATSU☆STARS! (singing voice)Debuts in the DCD game's 2016 series part 2 and episode 8 in the anime. Mahiru is Yozora's younger sister, and has a similar aptitude for modeling. She has a mature aura that makes her difficult to approach, but is shown to quickly befriend Koharu after she gives Mahiru cough drops to help with her cough. Her goal is to surpass her sister, with whom she initially held a strong animosity towards. A Sexy type idol, her theme color is violet, her preferred brand is Romance Kiss, and she is a Moon Beauty Class student.
Lily Shirogane (白銀リリィ, Shirogane Ririi)Voiced by: Reina Ueda (speaking voice), Nanase from AIKATSU☆STARS! (singing voice)Debuts in the DCD game's 2016 Series Part 2 and episode 23 in the anime. A senior manager of the Song Class, Lily is a strong, self-composed girl who isn't easily influenced by others. She is a childhood friend of Yuzu's, who is the only person who is allowed to call her "Lilyenne"
(リリエンヌ, Ririennu). A Cool type idol, her theme color is viridian, her preferred brand is Spice Chord, later Gothic Victoria, a brand she created, and is a Flower Song Class student and admin.
Subaru Yuki (結城すばる, Yūki Subaru)Voiced by: Taku YashiroA student at Four Star Academy's male vision and a member of the top male idol unit, M4. He often meets up with Yume incidentally, and makes it a habit of teasing her, but is shown to give her solid advice. He is in love with Yume although he always denies it. He gets jealous when Nozomu talks to Yume because they get along very well. He likes to annoy Yume by calling her "Tomato" or "Boiled Octopus".
Nozomu Igarashi (五十嵐望, Igarashi Nozomu)Voiced by: Yūto UemuraA member of M4 and Moon Beauty Class. He is aware that Subaru is in love with Yume, going as far as to inquire if Subaru was jealous of him and Yume. Nozomu becomes reassured when he denies this, as he would hate having to go up against "a rival as strong as Subaru". He likes Yume, because she is really funny and cute.
Asahi Kasumi (香澄朝陽, Kasumi Asahi)Voiced by: Shun HorieA member of M4 and the Bird Theatre Class. He is Yozora and Mahiru's brother, he has a bubbly and playful personality. He is in love with Nanakura Koharu.
Kanata Kira (吉良かなた, Kira Kanata)Voiced by: Arthur LounsberyA member of M4 and the Wind Dance Class. His name means "Good Luck".
Yuri Ashida (芦田有莉, Ashida Yuri)Voiced by: Aoi KogaYume's upperclassman who's in charge of the Dress Make Room, where idols can customize and create their own coords. She is a Cool type idol and she is a senior manager of the Flower Song Class.
Haruka☆Ruka (ハルカ☆ルカ)Voiced by: Sayaka NakayaAn excitable girl who is the top student of the Wind Dance Class first years.
Hikaru Morohoshi (諸星ヒカル, Moroboshi Hikaru)Voiced by: Daisuke HirakawaThe mysterious headmaster of Four Star Academy. He has a subtly merciless and manipulative personality, frequently setting up trials to test Yume's ability and stating that if Yume does perform up to par, he will expel her from the school, and that her life as an idol will come to an end if she does not learn to control her power.
Anna Hibiki (響アンナ, Hibiki Anna)Voiced by: Akemi KandaYume, Rola, and Ako's homeroom teacher and the instructor of the Flower Song class. Her personality, mannerisms, and appearance are that of an archetypical rock star. It's revealed in Episode 27, that Anna was Four Star Academy student and S4 member.
Momoko Yachigusa (八千草桃子, Yachigusa Momoko)Voiced by: Emi OkadaThe instructor of the Bird Theatre class. It's revealed in Episode 27, that Momoko was Four Star Academy student and S4 member.
Dave Sato (デーブ 佐東, Dēbu Satō)Voiced by: Kenta MatsumotoThe instructor of the Wind Dance class.
Tamagoro Miwa (美羽玉五郎, Miwa Tamagorō)Voiced by: Kazuyuki OkitsuThe instructor of the Moon Beauty class.
Yamaguchi (山口, Yamaguchi)Voiced by: Atsushi KakehashiThe director of S4's special programs. He later attends Yume's first solo concert.
Jiro Okamoto (岡本二郎, Okamoto Jirō)Voiced by: Mitsuru OkataThe director of Aikatsu! TV dramas. He later attends Yume's first solo concert.
Kaoru Komoto (幸本薫, Kōmoto Kaoru)Voiced by: Mei ShimodaThe president of a sweets shop known as Saiwai Hanando and an old friend of Headmaster Morohoshi's. She later attends Yume's first solo concert.
Masaru Nijno (虹野 大, Nijino Masaru) and Kyoko Nijno (虹野 景子, Nijno Kyōko)Voiced by: Fuminori Komatsu (Masaru) and
Aya Hisakawa (Kyoko)Yume's parents.
Hotaru Yukino (雪乃ホタル, Yukino Hotaru) / Hotaru Morohoshi (諸星ホタル, Morohoshi Hotaru)Voiced by: YukanaHikaru's older sister. A former Four Stars Academy student and former S4's representative of Flower Song Class during her time. Hotaru was the first person to have experienced a mysterious power, before Hime and Yume. But due to relying on that power too much, she lost her ability to sing. Her voice was known as "The Fleeting Shooting Star". Now Hotaru is a gardener.
Ayumi Naruse (鳴瀬あゆみ, Naruse Ayumi) and Naho Aoyama (青山ナホ, Aoyama Naho)Voiced by: Hina Kino (Ayumi) and Yuuki Kuwahara (Naho)Two girls from Shiny Academy who auditioned to become Saiwai Hanando's campaign girl. They initially belittle Yume, saying she's unfit for Four Star Academy, but are later helped by Yume across a tight rope bridge. They are later seen watching Four Star Academy's Summer Festival.
Nico (ニコ, Niko) and Coco (ココ, Koko)Voiced by: Yū Wakui (Nico) and
Yūki Kuwahara (Coco)Two elementary school sisters who are big fans of Yume and later attend Yume's first solo concert.
