atiladahun is the hollow earth born demon from mulan an demon cast out of hell, they live in the hollow earth large japan shape continent at the twin mountain point kingdom called jigoku till one day a human women name ruli tsukiyono came to the kingdom palace she met the demon prince and zenai with him. witness by all demon in the castle in a supernatural way,this is his journey.

it was after the defeat apolcalymon, kari light was being snuff out till one day kari found herself in the black ocean with a boy in the water and her trusty gatomon she is reminded how digimon and their world always needed to be save again and again she went to the water as he feel the boy hatred, one incident later they agree to make the world a better place karixochimekawa