Cirno is the ice fairy from ZUN's Touhou Project, the long-running series of bullet hell shooters from Team Shanghai Alice, debuting as the stage two boss of Embodiment of Scarlet Devil in 2002. Perfect Freeze is one of her signature spell cards, a screen-wide burst of ice she announces by name. ZUN famously marked her as ⑨, slang for idiot, in a game manual, which turned her into a beloved baka mascot across fan art, remixes and memes. The clip circulates on soundboards as her most recognisable attack call.