Sato Ayano (佐藤綾乃) is an idol managed by Up-Front Agency. She is a former member of the group Up Up Girls (Kakko Kari), the group UFZS, and a former member of Hello! Project as a Hello! Pro Egg. She first appeared as a member in the April 2009 issue of De☆View and was introduced at the 2009 Hello! Project Shinjin Kouen 4gatsu ~Yokohama HOP!~ concert on April 4, 2009. She graduated from Up Up Girls (Kakko Kari) on September 16, 2017.
- Name: Sato Ayano (佐藤綾乃)
- Nickname: Ayanon (あやのん)
- Birthday: January 7, 1995
- Birthplace: Kanagawa, Japan
- Blood type: A
- Height: 149.8cm
- Favorite Subjects: Maths, science, P.E.
- Looks Up To: Natsuyaki Miyabi
- Hello! Project groups:
- Hello! Pro Egg (2009–2011)
- Up-Front groups:
- Gatas Brilhantes H.P. (2012)
- TV Programs
- TV Dramas
-  Yuusha Yoshihiko to Maou no Shiro (勇者ヨシヒコと魔王の城)
-  Real Onigokko THE ORIGIN (リアル鬼ごっこ THE ORIGIN)
- Music Videos
-  Mano Erina - "Onegai Dakara..." (お願いだから・・・) (as back dancer)
-  Mano Erina - "Genkimono de Ikou!" (元気者で行こう!) (as back dancer)
-  "Akuma no Tsubuyaki" ~Akuma de Cute na Seishun Graffiti~ (「悪魔のつぶやき」～アクマでキュートな青春グラフィティ～)
- She has loved to sing since she was little.
- She performed the song "Honto no Jibun" by Buono! during her audition for Hello! Pro Egg.
- Is good friends with Fukumura Mizuki and Takeuchi Akari.
- In January 2011 it was announced that she would be part of a dance cover group called UFZS that represents Up Front and womens magazine Josei Jishin.
- On March 9, 2011 it was announced that Sato Ayano had completed her Egg training.