Kasane Teto debuted in 2008 as an April Fools joke character for the UTAU singing software, presented as a fake Vocaloid before becoming a real voicebank. Her twintail design and chimera lore made her a lasting fan favourite, and she later gained a commercial Synthesizer V voice in 2023. Short spoken clips in her voice circulate in anime edits and soundboards, where fans use this polite thank you as a quick, recognisable reaction for gratitude, trades and collaborations within Vocaloid and UTAU communities.