Hanasato Minori: A fellow group member and good friend. Airi coaches her and respects her dedication and spirit. Although she initially doubted whether Minori would actually become an idol, she was reinvigorated by her determination to reach her dream. While Airi can be harsh with training, she genuinely cares for her, not letting her overwork herself. Despite their rough start, the two can understand each other's struggles in a way their other group members cannot due to having similar experiences in the past. In the Chasing The Sparkle Beyond the Blue Sky event, Airi gives Minori pointers and expresses how she used to be like her in that they both tried copying others.
Kiritani Haruka: A fellow group member and friend. Haruka thinks Airi is greatly undervalued in the idol world. Airi admires Haruka's natural charm and poise, and often reminds her to take breaks. Prior to the main story, the two had both known about eachother and their respective groups, though Airi was reluctant to speak to her due to thinking she was just some "big shot idol". Meanwhile, Airi had left an impression on Haruka for her work ethic and dedication after she saw a short section including her for a show.
In the Happy Lovely Everyday! event, Haruka was the first person to notice that something was wrong with Airi, and had convinced her to do a solo show for the elementary school children in order to cheer her up and show her that she’s liked for who she is.
Hinomori Shizuku: A fellow group member and her close friend. The two debuted as idols at the same time and worked at the same agency. Although Airi regarded Shizuku as a rival, they supported each other and helped each other get through their debuts. Unfortunately, as their careers took off, Airi began to feel jealous of Shizuku's beauty and success. In the main story, Airi becomes bitter after being reminded about her past and blows up at Shizuku when the other tries to comfort her. Despite her harsh words, it is shown that Airi cares deeply about Shizuku, as she apologizes for her misjudgment and stands up for Shizuku against the other Cheerful*Days members. After forming MORE MORE JUMP!, the two become closer and Airi often acts protective of her. In Shizuku's pre-upgraded cards, it is a running gag to see Airi trying to prevent, and usually failing, Shizuku from spilling something while Shizuku gets distracted by someone or something nearby. The two are also classmates.
Tenma Saki: Saki is a big fan of Airi and used to watch the variety programs Airi starred in while she was hospitalized. Airi is surprised after Saki meets at her school and asks for both an autograph and a handshake, before encouraging Saki to shake her hand as many times as she wants.[1] They later interact more in the Secret ♡ Operation Valentine's Day event, where they team up together with Emu to make Valentine's Day's sweets for their respective groups.
Shinonome Akito: Airi's acquaintance. They met in middle school, and she greeted him every once in a while when she visited the Shinonome household. It’s implied that she and Akito aren't particularly close, as Akito regards her the same way as he does other acquaintances, and she has mentioned on occasion that they don’t talk very often.
It was revealed in a side story that Airi once went to Akito about Ena's issues with her father, which Ena had been hiding from Airi at the time.[2] Out of gratitude for all that Ena had done for her and worrying that she can't do much for Ena herself, Airi asked Akito to look after Ena in her place. This request is reflected in their Trust Rank title "Still, That Day's Promise" and their team title "Secret Request".
Shiraishi An: Airi's acquaintance. The two first meet in the The Tomorrow We Hope For event, but become more thoroughly acquainted in the Wishing to the Blue Sky for Your Happiness! event when they pose in group wedding photos with Shizuku and Kohane.
Otori Emu: Emu and Airi met for the first time in the Secret ♡ Operation Valentine's Day event. The two worked together with Saki to make Valentines treats for their respective groups.
Asahina Mafuyu: A schoolmate whom Airi gets to know through Shizuku.
Shinonome Ena: Airi's best friend. They first started talking when Ena stood up for her in middle school, as people were making fun of her appearance in a variety show. Airi describes her as having an "eye for fashion", and Ena helped her to appear more fashionable before she became famous as an idol. They also own matching things, such as the yellow cat cushions.
Airi feels the need to repay Ena because she feels as if she didn't do anything to help her back in middle school. It was because of this that she secretly enlisted the help of Akito in looking after Ena.[3] Airi also admires Ena for her perseverance, seeing it as her best quality.
Akiyama Mizuki: Airi and Mizuki became friends during the What's On Your Mind? Exciting Picnic! event. While participating in one of the events in the highlands, Airi voices out her gratitude for Mizuki becoming friends with Ena, and encourages them to talk to Ena whenever something is bothering them.[4]
Hatsune Miku: VIRTUAL SINGER and fellow idol.
Kagamine Rin: VIRTUAL SINGER and fellow idol.
Megurine Luka: VIRTUAL SINGER and fellow idol.
MEIKO: VIRTUAL SINGER and fellow idol.
Kagamine Len: VIRTUAL SINGER and fellow idol.
KAITO: VIRTUAL SINGER, fellow idol, and manager.
Kizuna Rank[]
| Character | Rank 5 | Rank 26 | Rank 46 |
|---|---|---|---|
|
Pigtail Duo (ツインテールなふたり) | Hearts Give Idols Life (アイドルはハートが命) | Seal it With a Wink (ウィンクで決め！) |
|
Rays of Sunshine (元気印) | Powerful Idols (パワフルアイドル) | Looking Ahead (前を向いて) |
|
Messenger Of Feelings (想いのメッセンジャー) | Is MCing Your Specialty? (MCはお手の物？) | It Definitely Reached Them (きっと届けられてたよ) |
|
Well-Meaning Taskmasters (仲間想いゆえのスパルタ) | Summer! Sea! Camp! (夏だ！海だ！合宿だ！) | Racing Barefoot Into The Blue (素足で駆けるブルーマリン) |
|
A Secret Fan? (隠れファン？) | Able To Finally Say Thank You (やっと言えたありがとう) | Keep Spreading Hope And Courage (これからも勇気と希望を！) |
|
Resident Quipsters (ツッコミ担当) | The Dependable Ones (頼れるしっかり者) | Coddling Is Our Kryptonite (甘えられると弱い) |
|
Spartan Mentors (スパルタ指導) | Dance Lesson (ダンスレッスン) | Walk the Same Path (一緒に同じ道を) |
|
The Strongest!!! (最強よ！！！) | Reliable One (しっかり者) | Let's Start Over (ここからもう一度) |
|
Trainee Idols (研究生仲間) | Thanks to You (あなたのおかげで) | Ups and Downs (苦楽をともに) |
|
Short Pigtail Alliance (ミニツインテール同盟) | Is This Seat Taken? (隣とっちゃうわよ？) | Bestest, Baddest Bridesmaids (最強最高のブライズメイド) |
|
Passionate Girls (パッションガールズ！！) | Unyielding Idol And Singer (不屈のアイドル＆シンガー) | The Last Hug Of Happiness?! (幸せのラストハグ！？) |
|
Thanks For Looking After Ena (絵名がお世話になってます) | Such A Good Younger Brother (本当によくできた弟ね) | That Day's Promise Still Stands (あの日の約束は今も) |
|
Fluffy Pink (ふわふわピンク！) | Lion Dance Friends♪ (ライオンダンスでお友達♪) | Long Live The Alliance! (同盟は永遠に！) |
|
Greetings At the Diner (ファミレスでこにちは) | If Your Mind's Set, It's OK! (心が決まったならOK！) | Putting Your Feelings Into It With Those Hands (この手で想いを込めて) |
|
Can't Leave Someone Behind (放っておけない性質) | Brave When Need Be (いざとなれば度胸と根性) | My Best Friend Forever! (いつまでも大切な親友！) |
|
My Friends' Friends Are My Friends (友達の友達も友達) | Tempest Of Empathy For Ena (絵名にまつわる共感の嵐) | Hope Everything Works Out (その悩みが晴れますように) |