Suma Ai (須磨愛) was a Japanese pop singer and idol managed by Up-Front Agency and part of Hello! Project as a member of SI☆NA, and a winner of the Hello! Project Kansai 2005 Audition. She had previously been a finalist in the Morning Musume Audition 2005. She was a guest presenter for MJTV Chotto Kiiteyo! in June 2007.
- Name: Suma Ai (須磨愛)
- Nickname: ai
- Birthday: April 15, 1992
- Birthplace: Osaka Prefecture, Japan
- Bloodtype: A
- Height: 154cm
- Hobbies: Hair, nail coordination, clothing
- Specialty: Speed bike saddle
- Favorite Food: Umeboshi, green tea, potatoes, vegetables, liver, tuna, sea urchin
- Favorite Sports: Wakeboarding, snowboarding, swimming
- Looks Up To: Tanaka Reina, Goto Maki
- Hello! Project groups:
- SI☆NA (2008–)
- Her motto is "Always be polite, good rhythm, good energy".
- She thinks her charm points are her left tooth and her nails.
- [2009.04.02-] Ahoyanen! Sukiyanen! (as part of "7's Style")