Filian is a VTuber known for her chaotic VRChat streams on Twitch, where her high-energy, self-deprecating humour and frequent improvised reactions helped her build a large following. 'What da helli' is one of her most recognisable catchphrases, a playful twist on 'what the hell' that fits her silly, over-the-top delivery. Clips of the line spread through fan edits, TikTok videos and soundboards, where other creators reuse it as a quick reaction sound. Its short length and instantly recognisable voice keep it popular for memes, gaming highlights and reaction videos.