Neco-Arc Chaos is a parody character in the Melty Blood fighting game series, originating from the Tsukihime universe by Type-Moon. As a bizarre, cat-like caricature of the villain Nero Chaos, Neco-Arc Chaos is known for its comedic antics, chaotic behavior, and over-the-top fighting style. Serving as both comic relief and a challenging opponent, Neco-Arc Chaos brings chaos to the storylines and battles, standing out as one of the most memorable joke characters in the Melty Blood roster.