Cirno is a beloved character from the Touhou Project series, first appearing in 'Embodiment of Scarlet Devil.' She became an internet icon primarily due to the '⑨' symbol, which appeared in the game's manual as a label for 'idiot' (baka). This led to the fan-driven joke that she is both the strongest fairy and incredibly unintelligent. The meme often features her overconfident personality, her association with the number nine, and her signature blue ice wings. It peaks in popularity every year on September 9th, known as 'Cirno Day,' where fans create countless iterations of her being 'the strongest' or simply showing off her icy baka energy.