Rei Kagura

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Rei Kagura
SideM Character Data
Name: 神楽麗 (Kagura Rei)
Voice actor: 永野由祐 (Nagano Yuusuke)
Age: 16
Height: 165 cm
Weight: 52 kg
Shoe Size: 24.5 cm
Birthday: June 17th
Blood type: B
Hobbies: Applying hand cream
Skills: Can accurately play any violin piece after just hearing it once
Handedness: Right
Horoscope: Gemini
Hometown: Tokyo
Ex-Job: Violinist
Card Type: Intelligent
Image Color:     
Rei sig.png

Rei Kagura (神楽麗 Kagura Rei) is one of the available idols in the mobile game THE iDOLM@STER: SideM. He is voiced by Yuusuke Nagano (永野由祐 Nagano Yuusuke).



"I'm Rei Kagura. My specialties are playing the violin and singing. As for this project, I'm listening."

Character Description and Personality

Rei is the young but responsible violinist of Altessimo. What he loved more than anything was to share his music, but he lost his passion to play to money mongers. The producer approached him, complimenting Rei on his talent and offering him a position at 315 Productions. Of course, Rei was skeptical at first, his unit member Kei Tsuzuki's off personality adding to his initial distrust.

However, over time he began to enjoy his job more. During the practice of a children’s music program, he noticed a boy unable to sing. While the children took a break, Rei offered to sing along with the kid, making the kid very happy. Seeing the kid now smiling and able to sing with the rest, Rei thought to himself how glad he was that he became an idol.

Because Kei tends to zone out and wander off on his own, it is up to Rei to look after him. Still, Rei does not see Kei as a liability, and he highly appreciates Kei’s support and respects his talent. Rei believes that alongside him that he can keep going as an idol.

Rei is socially awkward, not having had many friends in the past. He argues he does not know how to talk with people his age or even just what to talk about. Shiki Iseya helped Rei open up in this respect when Shiki approached him after a joint live. The two went to a cafe to listen to classical music and chat.

Much like Jiro Yamashita, Rei also has an intense love for horses. He is also easily flustered, having been caught acting out of character to discovering some of his idol outfits were very feminine. He owns a golden retriever, favoring them for their intelligence and reliablity.

Game Discography

Song Discography

Image songs

Echoes My Note

Recorded Solo Songs

Recorded Group Songs

Trivia and Fan Culture


  • Rei, Ren Kizaki, and Shiki Iseya are good friends. They first interacted in the White Day 2016 event, and as seen in Rei's offshot card, regularly hang out together since then.
  • In SideM's Tales franchise collaboration event, he cosplays as Leon Magnus (true name: Emilio Katrea) from Tales of Destiny.

Fan Culture

  • When in group fanworks, Rei tends to be grouped together with more slender and androgynous looking boys such as Pierre, or crossdressing boys like Saki Mizushima.

Character Gallery

SideM Cards