|Cinderella Girls Character Data|
Master Trainer (Japanese: ﾏｽﾀｰﾄﾚｰﾅｰ Master Trainer) is an idol available in THE iDOLM@STER Cinderella Girls. Her basic card is S Rare. Her card is available by maxing out an idol's affection, by ranking in "Idol Training Camp #2" event, and by Star Emblem Campaign Prizes. She was originally voiced by Ayumi Fujimura (藤村歩 Fujimura Ayumi) until she was recast by Ayane Sakura (佐倉綾音 Sakura Ayane) on November 28th, 2022.
- All the Trainers are sisters, with the Master Trainer as the oldest.
- Her official name is Rei Aoki according to "The iDOLM@STER Cinderella Girls - New Generations" manga.
- All the Trainers are the first characters of the Cinderella Girls series and the fourth ones in THE iDOLM@STER franchise as a whole (following Yukiho Hagiwara, Kazuki Tsukumo, and Yuika Mitsumine) to be recast.