Phantom Siita

Name (Japanese)

ファントムシータ

Name Reading

(fantomu siita)

Members

Mona / Miu / Rinka / Moka

Location

Currently in preparation

Agency

Currently in preparation

Profile

Phantom Siita is a four-member Japanese idol group produced by Ado. Formed in 2024, they debuted on June 26 with the digital single “Otomodachi.” The group’s concept is “retro horror”, and they are managed by Cloud Nine with releases through Virgin Music since 2025. Members: Mona, Miu, Rinka, Moka. Musical style. Phantom Siita blends glossy J-pop hooks with theatrical, ominous aesthetics. Their repertoire draws from prominent creators: “Otomodachi” by Koharu (Charan-Po-Rantan), “Devilish Girl (Mashō Shōjo)” by naki-so, and “Noah” by Hiiragi Kirai, reinforcing a dark, story-driven sound. Overseas activity (recent). The group completed its first world tour “Moth to a flame” in Jan–Feb 2025, visiting Taipei, Manila, Singapore, San Jose, Anaheim, Dallas, Houston, Chicago, New York, Toronto, Utrecht, Paris, Berlin, and London—including venues such as San Jose Civic and Electric Ballroom. Since spring–summer 2025 they have focused on domestic shows (Japan tour and major festivals).