Demon

demons are mistical creaturs,they live in other dimantions. in anime there is powerful demon Mōryō, he absorbs Shion's mother. Moryo wishes to destroy five great shinobi nations with his ghost army. He was destroyed by Naruto's and Shion's super chakra rasengan. Also in manga there are another demos, tailed beasts but all of them are sealed in jinchurikis. the strongest tailed beast is nine tailed fox which is seald in naruto uzumaki.