Ayako Hamada
On February 27, 2012, Shimmer Women Athletes announced that Leon would be making her American debut for the promotion on March 17. In her debut match on "Volume 45", Leon was defeated by Sara Del Rey. Later that same day on "Volume 46", Leon teamed with Ray to defeat Davina Rose and Mia Yim in a tag team match. The following day on "Volume 47", Leon and Ray unsuccessfully challenged Ayako Hamada and Ayumi Kurihara for the Shimmer Tag Team Championship. Later on "Volume 48", Leon defeated LuFisto in her final match of the weekend.