Neco-Arc is the official gag mascot of Type-Moon, first appearing in bonus content for the Tsukihime visual novel in 2000 before becoming a joke playable character in the Melty Blood fighting games and a fan favorite in the Carnival Phantasm anime from 2011. Her high-pitched catgirl voice, full of nya sounds and unhinged laughter, became an early internet meme shared across forums and video sites. Fans still trade her clips alongside other anime voice memes such as the anime ahh and tuturu clips, using her voice as shorthand for playful chaos in edits and reaction videos.