In September 2018,
WACK announced that Ayuni D would launch a solo project with
Avex Trax under the name Pedro. Ayuni D, who plays bass and provides the vocals, was joined by former
Number Girl member Hisako Tabuchi on guitar and Shōta Mōhri on drums. In March 2019, it was announced the Pedro had signed with the
EMI Records division of
Universal Music Japan. Their first album,
Thumb Sucker, was released on August 28. On March 6, 2020, a re-recording of
Zoozoosea, titled
Super Zoozoosea, was released digitally. They released their second EP, , on April 29. Followed by their first single, on August 12. Their second album, , was released on August 26. They released their second single, , on February 10, 2021. On February 26, the digital single, , was released, followed by another digital single, , on August 6. They released their third album, , on November 17. Pedro went on an indefinite hiatus on December 22, after their final concert at Yokohama Arena. A digital single, , was released on December 27, five days after they ceased acitivies. On June 30, 2023, after the disbandment of Bish, Pedro announced that they would resume activities outside of WACK under Ayuni D's newly established company, Roman Planet. Hisako Tabuchi remained a member of the band, while Yumao of
Hitorie replaced Shōta Mōhri on drums. They released a reissue of their third album, which was renamed , on July 5. On August 18, a re-recording of their song was released digitally. They released their third single, , on August 23. Their fourth album, , was released on November 29. They released their third EP, , on November 6, 2024. In 2026, PEDRO collaborated with Taiwanese band Sorry Youth (拍謝少年) releasing a single titled "Outta My Way". AYUNi D performed with Sorry Youth at the MegaPort Festival in Kaohsiung on 21 March 2026. ==Members==