Io Shirai

About Io Shirai

Masami Odate (大館昌美, Ōdate Masami) is a Japanese professional wrestler. She is signed to WWE, where she performs on the Raw brand under the ring name Iyo Sky (イヨ・スカイ, Iyo Sukai) (stylized in all caps). As of 2025, she is a former two-time WWE Women's Tag Team Champion with Dakota Kai, as well as a former Women's Money in the Bank contract holder, former WWE Women's Champion, and former Women's World Champion. Known for her athleticism and in-ring ability, she is regarded as one of the best women's wrestlers in the world.

She competed as Io Shirai (紫雷 イオ, Shirai Io) in WWE's developmental brand NXT, where she was a former NXT Women's Champion and NXT Women's Tag Team Champion with Zoey Stark, and previously in World Wonder Ring Stardom (Stardom), where she was a two-time World of Stardom Champion. In Stardom, she is also a former two-time Wonder of Stardom Champion, six-time Artist of Stardom Champion, the inaugural SWA World Champion, one-time Goddesses of Stardom Champion, and one-time High Speed Champion, making her the company's first Grand Slam 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. Her run in Stardom coincided with the rise of her own stable, Queen's Quest, which carried on after Shirai's departure in 2018 until 2024.

Making her debut in March 2007, she spent several years working as a tag team wrestler, teaming with her older sister, Mio Shirai, with whom she wrestled for various promotions across Japan and Mexico. In June 2010, she and her sister came together with Kana (Asuka (wrestler)) 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. In April 2013, she won the promotion's top title, the World of Stardom Championship, later holding it twice, with each reign lasting for over a year. She worked for Stardom from 2011 until 2018, when she signed with WWE.

Shirai made her WWE debut at the 2018 Mae Young Classic tournament, where she lost in the finals to Toni Storm. She was later assigned to the NXT brand, where she officially turned heel in 2019, and won her first championship in WWE, the NXT Women's Championship, in June the following year. She made her debut on the main roster at SummerSlam in July 2022 under the new name Iyo Sky and subsequently became a member of Bayley's (Pamela Rose Martinez) stable, Damage CTRL. After winning the Money in the Bank contract, she won the WWE Women's Championship at SummerSlam in August 2023, before losing it to Bayley at WrestleMania XL in April 2024. In March 2025, Sky won the Women's World Championship, making her the tenth WWE Women's Triple Crown Champion and the seventh WWE Women's Grand Slam Champion. She also became the first Japanese wrestler, male or female, to ever become Grand Slam Champion in both Japan and the United States.

Odate was previously in a relationship with fellow professional wrestler Kazushige Nosawa; the two lived together in Koto, Tokyo.