The sound centres on Sana, the Japanese member of South Korean group TWICE, whose playful delivery turned a simple Harry Potter reference into a fan favourite. Shared widely in fan edits, reaction videos and short-form clips, the phrase caught on because it pairs Sana's bright personality with a familiar pop culture name, making it easy to reuse out of context. It remains popular with ONCE, the group's fandom, and with meme editors who want a short, cute and instantly recognisable voice moment for lighthearted videos.