Also known as: 调月莉音, 调月莉央, 莉音, 調月リオ, 調月リオ(ブルーアーカイブ), Tsukatsuki_Rio, リオ, ビッグ・シスター, 츠카츠키리오, 리오
A character from Blue Archive. President of Millennium's student council, Seminar (Blue Archive). Nicknamed "Big Sister", in reference to 1984 (Novel)'s Big Brother (1984).
Her full name is Tsukatsuki Rio.
Has very long Black Hair decorated with a single Hairclip shaped like the Millennium Science School Logo and ringed Red Eyes with White Pupils. Wears a white Turtleneck Sweater underneath a black Blazer with a Id Card. Also wears a Pleated Skirt over Pantyhose, a Holster strapped to her thigh, and black High Heels. Her firearm is a M1911 pistol, and she is often seen with a Tablet PC.
Original artist: Mx2j
Voiced by: Lynn (Voice Actor)
