Neco Arc is a joke character from Type-Moon's Tsukihime universe who became a regular in the Melty Blood fighting games, where her exaggerated personality and high-pitched voice made her a favourite for parody. Clips of her laughter spread through YouTube and TikTok meme edits, where creators reused the sound to mark chaotic, silly or unhinged moments. Because the laugh is short, instantly recognisable and easy to drop over almost any visual gag, it has stayed popular long after its first viral edits.