Phantom Siita (ファントムシータ / 怪忌蝶) is an idol girl group produced by Ado. The group made their official debut on June 26, 2024 with the digital single "Otomodachi". There are currently four members in the group ; Mona, Miu, Rinka, and Moka. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.