Sailor Aluminum Siren (セーラー・アルーミナム・セイレーン, Seeraa Aruuminamu Seiren) is a major antagonist of Sailor Moon Sailor Stars and it’s movie adaptation Sailor Moon Cosmos. She is the second of the Sailor Animamates to be introduced. Her human pseudonym is Reiko Aya (彩 れい子, Aya Reiko).