Mahjong Soul is an anime style online mahjong game developed by Cat Food Studio and published by Yostar, where playable characters voice their calls during matches. Ichihime, a cheerful cat themed girl, adds a nya sound to many lines, which made her Chi call especially memorable. In mahjong, chi is called to claim another player's discard and complete a sequence. Clips of her voice lines circulate among players as soundboard buttons and short edits, keeping this call popular as a cute shorthand for claiming a tile or reacting playfully.