Crimson Moon may refer to:
- Crimson Moon, a rebel against the Imperial Family of Ga Guk who wears a crimson mask
- Crimson Moon (Song), a song entitled and dedicated to the Crimson Moon which is forbidden to be sung by the Imperial Family of Ga Guk
- Hong Wol/Hong, the Korean translation of Crimson Moon and alias used by Yi Hwi, usually as a "painter"
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