2018. Despite losing, Sareee immediately demanded a rematch, which Inoue granted and was set up for July. In the rematch on July 22 in Kawasaki, Sareee defeated Kyoko Inoue to win the Diana World Championship for the first time. In her first defence on December 20, Sareee lost the title to Aja Kong. On January 6, 2019, she challenged and lost to Chihiro Hashimoto for the Sendai Girls World Championship. On February 11, she lost to Aja Kong in their rematch. On May 12 in Korakuen Hall, she finally defeated Kong in their third match to become a two time Diana World Champion. Later in the month, she called out Hashimoto to put both of their championships up in a double title match. Hashimoto agreed, and the match took place on June 8, 2019, with Sareee winning and claiming both the Diana World Championship and Sendai Girls World Championship. Sareee made her first successful defence on July 7, beating Dash Chisako in Korakuen Hall. Sareee lost the Sendai Championship on October 13 to Hashimoto, ending her reign at 127 days. On January 4, 2020, Sareee lost her Diana Championship to Ayako Sato, ending her second reign at 237 days. Sareee announced she will leave Diana in February, as she was heading to the United States. WWE (2020–present) On February 22, 2020, during a Diana show, Sareee confirmed that she had signed with WWE. Her move to the United States was delayed by the COVID-19 pandemic, causing a change in her move schedule. Because of this, WWE allowed her to continue working date in Japan until she could move to the United States. On August 30, Sareee made her return to the Japanese independent scene with Diana, wrestling Nagisa Nozaki to a ten-minute time limit draw. She briefly held Seadlinnng's Beyond the Sea Tag Team Championship with Yoshiko before losing them to Arisa Nakajima and Nanae Takahashi on January 22, 2021, which was Sarreee's final match on the indies. On the March 17, 2021, episode of NXT, she was given the new ring name Sarray. She made her debut on the April 20 episode of NXT, where she defeated Zoey Stark. On the August 10 episode of NXT, Sarray suffered her first loss against Dakota Kai. She made an appearance on the October 8 episode of 205 Live and defeated Amari Miller. On the January 18, 2022, episode of NXT, a