Phantom Siita (ファントムシータ)

Phantom Siita (ファントムシータ) is a Japanese girl group formed on June 25, 2024 and produced by Ado. The group was introduced as a six-member act consisting of 灯翠, 翠己, 美雨, 百花, もな, and 凛花. Working in j-pop and idol performance, Phantom Siita was built around a retro-horror concept with theatrical visuals, polished pop hooks, suspenseful staging, and a cinematic mood. Its visual identity presents the members as moths mimicking butterflies and emphasizes contrast, unease, and nostalgia as part of the performance. Ado announced plans to produce an idol group on October 31, 2023, and auditions opened the following week under Cloud Nine. Phantom Siita debuted on June 26, 2024 with the digital single 『おともだち』, later released 『キミと××××したいだけ』, 『魔性少女』, 『花喰み』, 『乙女心中』, and 『ゾクゾク』, and issued its first album 『少女の日の思い出』 on October 30, 2024. Its first one-man concert, 「ハイネ」, was held at 日本武道館 on November 1, 2024, and its first world tour, Phantom Siita 1st WORLD TOUR “Moth to a flame”, began on January 16, 2025. The group announced its major debut through Virgin Music on April 4, 2025 and released the single 『すき、きらい』 on May 9; on May 17, 2025, it was announced that 灯翠 would leave at the end of that month for health reasons. Phantom Siita also performed "Mo-ii-kai?", the ending theme for "Saikyou no Shokugyou wa Yuusha demo Kenja demo Naku Kanteishi (Kari) Rashii desu yo?". In 2026, the group continued its activities with the release campaign for "ホラークイーン" ("Horror Queen"), a free live performance in Odaiba, a Blu-ray/DVD release tied to its first world tour, Moth to a Flame, participation in a stage-and-photo-book project that also included its first reading musical, and an announcement that it would appear as an opening act for Ado’s Nissan Stadium concert.