Also known as: グレイトフル・ブルー, グレイトフルブルー, グレイトフル・モノクローム
An Official Alternate Costume from Idolmaster Million Live! (GREE). It later reappears in Idolmaster Million Live! Theater Days, worn by all 52 characters. It comes in three variations.
Appearance
- Right frill
- Back frill
- Shorts
- Grateful Monochrome (Official Alternate Color)