Keiko Aono

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Keiko Aono (born April 8, 1973) is a Japanese retired professional wrestler. She used several ring names during her career, including ECO, Haruyama #5, Keiko Aono, Keito, Santa ECO, and Santa Keito. Born in Kadoma, Osaka, Japan, she is 163 cm tall and weighed about 70 kg during her career. She began wrestling in 1996 and retired in 2018.

Aono competed in several Japanese promotions, notably Ladies Legend Pro-Wrestling (LLPW), JWP Joshi Puroresu, and World Woman Pro-Wrestling Diana (Diana). She also appeared in All Japan Women's Pro-Wrestling during LLPW’s partnerships with AJW. She formed a successful tag team with Yumiko Hotta, winning multiple titles across these promotions.

Championships and accomplishments:
- JWP Joshi Puroresu: Daily Sports Women’s Tag Team Championship (1) – with Yumiko Hotta
- JWP Joshi Puroresu: JWP Tag Team Championship (1) – with Yumiko Hotta
- World Woman Pro-Wrestling Diana: World Woman Pro-Wrestling Diana Tag Team Championship (1) – with Yumiko Hotta
- LLPW: LLPW 6-Woman Tag Team Championship (2) – with Harley Saito and Noriyo Tateno (1); Mizuki Endo and Reiko Amano (1)

Retirement: She finished her career on October 7, 2018 at Diana’s 30th Anniversary show, after a seven-year run with Diana and a long presence on the Japanese independent scene.