- Age : 18 (20 in present day, 16 in 2030)
- Birthday : January 6th (Capricorn)
- Bloodtype : A
- Height/Weight : 171cm/52kg
- 3 Sizes : 83-54-78
- Interests : Road Racing
- Fun Fact : She is considered a prince.
- Attribute : NO TYPE ➝ MODEL
Noble, dignified, and handsome. This triple threat is the shining prince of 7th Sisters, ranking #1 as a desired protector. She is the eldest member, and also has the most common sense. She is capable of handling unexpected harmful events by herself.
- Rui's voice actress, Meiko Kawasuki, has been confirmed to play the game, with screenshots on her twitter account.
- Judging by the photos, she is implied to be level 80 or higher.
- As a member of the 7th Sisters, her image color is YELLOW, and her symbol is a diamond (♦).