Overview
Ice Spirit of the Lake (湖の氷精) is a 2-player color palette swap of Cirno used in Phantasmagoria of Flower View and used as a common name. It is also called mourning dress color (喪服カラー, mofuku karā) in rare cases.
The color scheme is actually a dull blue, rather than black, and appears almost black on some screens. It was not used in Touhou Hisoutensoku.
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Touhou Touhou Project Phantasmagoria of Flower View Cirno Ice Fairy Black 2P Color