This article is about a/an manga exclusive character in Kamen Rider W.

Koyomi Zaizen (財前 暦 Zaizen Koyomi) is a user of Alcohol Gaia Memory in Futo Detective. Originally as a Geisha, she was chosen by Kiku Kagamino to be a candidate fiance of Kuuya Kagamino and the successor of Alcohol Gaia Memory.

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