Miia is the energetic lamia from Monster Musume, a series built around monster girls living with a human host, and darling is her affectionate name for Kimihito Kurusu. Short clips of her voice spread through anime soundboards and meme edits because the line is instantly recognisable to fans, even without subtitles. At under two seconds, it became a handy reaction sound for jealousy, excitement and comic panic, and it remains popular because it captures Miia's clingy, dramatic personality in a single shout rather than a longer scene.