It's between Akutagawa (Manon Legrand) And Tachikawa (Crimson Viper aka C Viper).
ストリートファイター6【あくたがわ (マノン) VS 立川 (C.ヴァイパー)】AKUTAGAWA (MANON) VS TACHIKAWA (C.VIPER) SFVI スト6