The true identity of the "fake Mufti" was "Reiwa Roman" Matsui Kemuri, who made a surprise appearance at a Kabukicho event

The "Mobile Suit Gundam: Hathaway's Flash: Mobile Suit Gundam: Hathaway's Flash Suit Gundam: Hathaway's Flash: The Witch of Circe," was held at Kabukicho Cinecity Plaza (Shinjuku Ward, Tokyo) on January 18th. The "Flash Senkou Rally" event, in which a pumpkin-headed character known as "Fake Mufty" appears around Tokyo, has been a hot topic on the anime's official social media accounts. It was announced that the "Fake Mufty" is actually Kemuri Matsui of the comedy duo "Reiwa Roman." Matsui made a surprise appearance at the event, saying, "Fake Mufty's activities will continue, so please keep an eye out," and adding, "I will not be appearing in 'Circe's Witch' as ​​Fake Mufty, so please go to the cinema without worry."

The event also featured appearances by Kensho Ono, who plays Hathaway Noah, and Reina Ueda, who plays Gigi Andalusia. The band "Alexandros" held a guerrilla live performance, performing the theme song for the first chapter, "Senkou," causing a stir in Kabukicho.

"Hathaway's Flash" is based on a novel published in 1989-90 by director Yoshiyuki Tomino, known as the creator of the "Gundam" series. Set in the year 0105 of the Universal Century, Hathaway, the son of Bright Noa, who experienced a bitter separation during the Second Neo Zeon War, pilots a new mobile suit, the XI Gundam, and rises up in rebellion against the Earth Federation government. The anime has been announced to consist of three chapters, with the first chapter, released in June 2021, being a hit, grossing approximately 2.23 billion yen. The second chapter, "Circe's Witch," will be released on January 30th.