Rem is one of the twin maids from Re:Zero, the anime series that began in 2016, and she became one of its most popular characters with fans who create edits, fan art, and short meme clips. The word guruguru is Japanese onomatopoeia for spinning round and round, which fits the clip's dizzy, looping feel. Shared widely in anime fan communities, the sound is now used less as a direct quote and more as a shorthand for cute obsession, dizziness, and chaotic affection.