Kai Nishijima

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Kai Nishijima
Kai SS.png
Cinderella Girls Character Data
Name: 西島櫂 (Nishijima Kai)
Voice actor: Unvoiced
Age: 19
Height: 172 cm
Weight: 49 kg
Birthday: August 17th
Blood type: O
Three sizes: 86-59-83 cm
Handedness: Right
Hobbies: Touring Aquariums, Swimming
Horoscope: Leo
Hometown: Osaka
Card Type: Passion icon.png
Kai sigSSR.png

Kai Nishijima (Japanese: 西島櫂 Nishijima Kai) is one of the characters available in THE iDOLM@STER: Cinderella Girls and THE iDOLM@STER Cinderella Girls: Starlight Stage. She is currently unvoiced.


Annual Rankings

Event Prelim Rank Final Rank
1st Cinderella Girl General Election Not a candidate Not a candidate
2nd Cinderella Girl General Election Unranked Unranked
3rd Cinderella Girl General Election Unranked Unranked
4th Anniversary Voice Idol Audition Unranked Unranked
4th Cinderella Girl General Election Unranked Unranked
5th Cinderella Girl General Election Unranked Unranked
6th Cinderella Girl General Election Unranked Unranked
7th Cinderella Girl General Election Unranked Unranked
8th Cinderella Girl General Election Unranked Unranked
9th Cinderella Girl General Election Not applicable Unranked
10th Cinderella Girl General Election Not applicable Unranked



"Good effort today, guys!! ...Wait, huh? Never seen you around before. Wait a sec... Could you be some kind of perv!? ...I've got the wrong idea? ...Huh, so you're an idol scout. But this area's off-limits to non-participants! Well, let's get out of here!"

Character Description

Kai is a young swimmer with an adventurous spirit. She hails from Osaka and is very passionate about swimming and idol work. Due to her love of swimming, a lot of her cards feature swimwear and aquatic themes. Kai could be considered one of the more tomboyish girls and is often depicted as the mood-maker type. In a few theater comics, She is shown to have a small friendly rivalry with Nagisa Aino, and the two compete to see who is more athletic. They are also part of a unit called Hot Art Jumpin' (Japanese: ホットアートジャンピン) along with Saki Yoshioka, these three are shown to interact in various media. Kai first began swimming at a very young age, due to getting forced by her parents to take swimming lessons. She didn't quite enjoy it and was constantly urged to quit for good, however, during her childhood, her dad took her to an aquarium park for the first time and was amazed by the swimming sea animals she saw. Because of this experience, she later on came to the conclusion that swimming can make people smile, which is why she quickly regained interest and remained passionate about her hobby ever since. She also shows a big liking toward dolphins because of her love for aquarium parks and they're depicted in both her casual and stage outfits. Kai is also shown to sometimes speak before she thinks, making her seem like a bit of an airheard. In the tie-in Cinderella Girls Theater skits, She encourages Mutsumi Ujiie to help her instigate dolphins to get splashed by them. Kai’s fashion sense has proved to be somewhat troublesome, as she doesn’t like skirts and has difficulty not wearing a swimsuit as her casual street clothes. She knows of Sanae Katagiri’s drinking habits and has trouble keeping up with Arisa Mochida’s enthusiasm on the beach.

Trivia and Fanculture


  • Kai's hair resembles Miki Hoshii's (in her Awakened form) and Mio Honda's hair.
    • Players who have keen eyes may also notice that Kai's hairstyle resembles Otoha Umeki's, with the difference being the hair color (Kai's is brunette, while Otoha's is blonde) and the ahoge.
      • Coincidentally, both are in at least two units; one named Delightful Holiday, alongside Saori Okuyama. This unit appeared on April 30, 2017 in an event for the Mobage game, one another named 172cm's, alongside Manami Kiba (all three share the same height, 172 cm).
  • Kai is also in a unit with Nanami Asari called Commentary☆Fresh Fish Corner (解説☆鮮魚コーナー).
  • Outside of Hot Art Jumpin', Kai is also in other units featuring her members, such as:
    • Hot Athletes (ホットアスリーテス) with Nagisa
    • Dreaming Sports Girl (夢見るスポーツ少女) with Nagisa and Mahiro Kitagawa
    • With Support! Hot-Blooded Sports Girl (応援を力に!熱血スポーツ少女) with Nagisa, Mahiro, Tomoka Wakabayashi and Yuki Himekawa
    • smart & smart with Saki and Akiha Ikebukuro
    • Space Style (スペーススタイル) with Saki and Kozue Yusa
    • Cyber Space Tourists (電脳宇宙の観光客) with Saki, Kozue and Setsuna Imura
  • She shares the same birthday with Hiromi Seki.


  • Her appreciation times on Twitter are held every day at 24:00 and 24:40 JST with the hashtags #西島櫂が24時をお知らせします (Nishijima Kai ga 24-ji wo oshirase shimasu) which means "Nishijima Kai will inform you about 24:00" and #毎日24時40分は西島櫂タイム (Mainichi 24-ji 40-bu wa Nishijima Kai taimu) which means "Everyday at 24:40 is Nishijima Kai time".
  • Her line "警備員さーん!変質者で一すっ!!!!" (Anchisukiru-san! Henshitsu-sha desu!!!!) meaning "Security guard! It's a pervert!!!!" from the beginning of her first commu is frequently used as a meme among KaiP on Twitter.

Character Gallery


THE iDOLM@STER: Cinderella Girls Cards

THE iDOLM@STER Cinderella Girls: Starlight Stage Cards