- "Absolutely, I'm going to be the top star among all idols! Yume Nijino! Is about to start her Aikatsu!"
– Yume Nijino in opening intro Season 2
| S4 Uniform | Marching Coord | PR Coord | Uniform|
Star Coord | Movie | Movie 2 (w/ Laura)
|Affiliation||Four Star Academy|
|Data Carddass Game||Part 1|
|Anime||The Beginning of a Dream|
|Singer||Sena from AIKATSU☆STARS!|
Yume Nijino (虹野ゆめ) is the main protagonist of the Aikatsu Stars! series. She is a member of S4, a student at Four Star Academy and belongs in the Flower Song Class. Yume is a cute type idol, whose preferred brand is her self-created brand, Berry Parfait. She is currently attending Venus Ark as an exchange student.
Yume is a fair skinned girl, with eyes of red, orange, and yellow. Her blonde hair has ombre coloring, turning pink towards the ends. She wears her hair in knotted, curled pigtails with matching forelocks and corner parted bangs and is almost always seen with her pink trademark ribbon worn on the left of her head. As a Four Star Academy student, she wears the standard uniform.
In Season 2, Yume's hair has grown longer and wavier, with noticeably more pink at the ends. Her pigtails are now tied higher from the back of her head, rather than the sides. As a student at Four Star Academy and a member of S4, she wears a specialized uniform for the S4 members.
Yume is known to be cheerful and full of curiosity but cries easily when touched. She is also a person with a strong will and can be impulsive with a mischievous streak. At times she can be bold but is slightly oblivious and gets embarrassed really easily. She never gives up no matter what happens and is always determined to help her friends or those she cares about. When Koharu moved to Italy, she volunteered to put on a show for her so that Koharu wouldn't be sad about leaving. She also never gave up on her dream of joining S4, and when she did it, she felt as if she had to work harder, as she said in Episode 51.
Yume grew up with her parents in their confectionery shop. She was also previously on the volleyball team at her school before entering Four Star Academy. During her entrance performance, Yume created a powerful rainbow aura which made her perform above average. After the performance, she fainted and woke up to Hime in the hospital wing.
- The very first friend Yume made at Four Star Academy. Yume considers Laura to be a precious friend and rival, and as such wants to help and support her as much as she can. They first met when Laura was late for class and asked Yume to open the window that was next to her because Laura was outside.
- Yume's childhood friend who of which she applied to Four Star with. Despite being in different classes, the two appear to be very close and were roommates until Koharu had to move to Italy.
- She admires Hime and longs to someday join her on stage. Hime also helps Yume understand her mysterious power and helped her overcome it when it's needed.
- Yume often meets up with him, but not intentionally. He calls Yume a "Boiled Octopus", much to her aggravation. Subaru often gives her a point in the right direction, but Yume has a short temper with him. However, she seems to be on friendly terms with him and is comfortable around him. In Episode 43, Yume declares Subaru as her rival, which he later reciprocates in Episode 50.
- They first become acquainted after Yume offers her a tanzaku for Mahiru to write down her wish. With the help of Laura and Koharu, she bakes Mahiru a chocolate cake for her performance, helping Mahiru remember the importance of a smile and actively supporting Mahiru with her goal of defeating Yozora. Mahiru later becomes Yume's fellow S4 member.
- Yume's fellow Yuzukoshō member and later her fellow S4 member. Since Ako gets too embarrassed to talk to Subaru, Yume often gets involved and ends up talking to him instead. Ako thinks of Yume as her 'love rival', because Yume tends to talk to Subaru a lot and it makes Ako jealous. However, they are good friends.
- Yume was scouted by Elza as the next new member of her idol school, Venus Ark. Yume sees Elza as a greatly talented person.
Nijino (虹野) Niji (虹) means rainbow and No (野) means field.
Yume (ゆめ) means dream.
- "One day, I'm going to be the top star among the idols! Yume Nijino! Is about to start her Aikatsu!"
– Yume Nijino in opening intro S1
- "But if you run away because you're scared, your dream will never come true. As long as you don't give up and do your best, you'll realize your dream for sure!"
– Yume to Subaru/herself
- "Yume Nijino, ready to go!"
– Yume before her performance
- "I have friends who support me, a rival to fight alongside me, and a senpai who always lights my path. Everyone believes in me, so I'll believe in myself too!"
- "I'm the one who should be saying thank you. There's so much I need to thank Koharu-chan and the others for."
- "Further along this path is surely the stage we'll meet Koharu-chan and Hime-senpai on. I won't give up, no matter what happens. Chasing a new dream, Yume Nijino's about to start her Aikatsu!"
- "I will not go! There's something wrong with judging a person's ability without seeing them perform. More importantly... Laura is my precious friend and rival. I'll never go along with someone who would insult her!"
– Yume refusing Elza's offer to come to Venus Ark
- "We can't just ignore Venus Ark's power. We have to face it head on and improve ourselves. We're proud members of Four Star Academy's S4!"
– Yume to Ako
- She is 154cm tall.
- Her zodiac sign is Pisces.
- Her favorite things are animals (particularly koalas) and sweets.
- Her specialties are daydreaming and the will to never give up.
- Her hobbies are playing volleyball and making sweets.
- Yume is the third Aikatsu! franchise protagonist, following Ichigo Hoshimiya and Akari Ōzora.
- Like the other main protagonists in the Aikatsu! franchise she has a trademark bow in her hair, is a Cute-type Idol, and has a pink theme color.
- Like Ichigo, she also performed a Special Appeal and obtained an Idol Aura in her very first stage performance.
- Like Ichigo, she is a Pisces.
- The surnames of all the main characters have to do with a phenomenon in the sky. Hoshi (星) meaning star, Ōzora (大空) meaning vast sky, and Niji (虹) meaning rainbow.
- Like Ichigo, who came from a bento shop, Yume also has a food-related background, as her parents run a pastry shop.
- Yume is the third character in the Aikatsu! franchise to have ombre hair, following Sora Kazesawa, Nina Dōjima, followed by Yozora Kasumi, Lilie Shirogane, and Elza Forte.
- She is the fourth character overall in the Aikatsu! franchise to have dual colored eyes, following Mikuru Natsuki, Nono Daichi, Nina Dōjima, followed by Mahiru Kasumi and Lilie Shirogane.
- She is the only character who does not share her singing voice with a character from the original series.
- Yume resembles Cure Flora from Go! Princess Pretty Cure as they both have blonde hair with a pink ombre in it.
- She is the second idol in the Aikatsu! franchise to faint after a performance.
- Her parents, as stated by Tsubasa in Episode 12, are owners of a confectionery shop.
- Yume is the first idol who isn't in S4 to perform in a Premium Rare Dress.
- Yume is the second known idol to have someone romantically interested in her, the first being Aoi Kiriya from the original Aikatsu! series, with Raichi Hoshimiya having feelings for Aoi.
- Yume is the second main character in the Aikatsu! franchise to change her hairstyle, following Akari Ōzora in the original series.
- Yume is the second idol to change her final pose, and is the fourth idol in the Aikatsu! franchise to change their pose following Mizuki Kanzaki, Ichigo Hoshimiya, Akari Ōzora, and Laura Sakuraba.
- She is the fifth idol in the Aikatsu! franchise to have created her own brand, following Mizuki Kanzaki, Sora Kazesawa, Hime Shiratori, Lilie Shirogane and followed by Elza Forte.
- She is the third idol to switch brands, following Lilie Shirogane and Mizuki Kanzaki from the original Aikatsu! series.
- She is the sixth teenager overall to have a brand, following Mizuki Kanzaki, Sora Kazesawa, Tsubasa Sena, Hime Shiratori, Lilie Shirogane and followed by Elza Forte.
- She is the first main protagonist in the Aikatsu! franchise to switch brands.
- Yume shares her voice actress with Gabriel from the anime Gabriel DropOut.
- Coincidentally, both have blonde hair with a pink ombre to it.
- Yume is the first idol in the whole Aikatsu! franchise to erase an idol's aura followed by Hime Shiratori.
- She and Laura are the only characters in the Aikatsu Stars! series so far to have performed two consecutive Special Appeals.
- Main article: Yume Nijino/Image gallery