Masami Odate (大館昌美, Ōdate Masami, born May 8, 1990) is a Japanese professional wrestler signed to WWE, where she performs on the SmackDown brand under the ring name Iyo Sky (イヨ・スカイ, Iyo Sukai) (stylized in all caps). She is a member of Damage CTRL and former two-time WWE Women's Tag Team Champions with fellow stablemate Dakota Kai. She previously wrestled in WWE's developmental brand NXT under the ring name Io Shirai (紫雷 イオ, Shirai Io) (/ˈiːoʊ/ EE-oh), where she was a former NXT Women's Champion and NXT Women's Tag Team Champion.
She is also known for her time in World Wonder Ring Stardom (Stardom), where she was a former two-time Wonder of Stardom Champion, six-time Artist of Stardom Champion, two-time World of Stardom Champion, the inaugural SWA World Champion, one-time Goddess of Stardom Champion, and one-time High Speed Champion. She was recognized as the "ace" of Stardom, and was the recipient of the 2015, 2016 and 2017 Tokyo Sports Joshi Puroresu Grand Prizes.
Making her debut in March 2007, she spent several years working as a tag team wrestler, teaming with her older sister Mio, with whom she wrestled for various promotions across Japan and Mexico, winning the TLW World Young Women's Tag Team Championship in the process. In June 2010, she and her sister came together with Kana to form the Triple Tails stable, which lasted for 15 months, before Io broke out of the group and embarked on her singles career in Stardom. Io quickly became one of the promotion's top stars, and in April 2013, she won the promotion's top title, the World of Stardom Championship, which she held twice, with each reign lasting for over a year. She worked for Stardom from 2011 until 2018, when she signed with WWE.

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