The tutturu greeting comes from Mayuri Shiina in Steins;Gate, where her cheerful tutturu became one of anime's most recognisable catchphrases. Filian, a VTuber known for loud, chaotic comedy and animal-like bits, blends that reference with her own barking hello, creating a clip that works as both an anime nod and a random streamer moment. Shared through VTuber clips and soundboards, it survives because it is instantly recognisable to anime fans and funny even without the reference.