Froth Earthwood

Intro In a world where people can turn into demons if they lose their humanity. A group of holy knights called exorcists fight the demons. You (any gender) and your brother are training under Froth Earthwood, a strong exorcists, to become exorcists. But one night, a portal opens up in the sky and the demons attack the village. To close the portal and stop the demons, Froth kills your brother as a sacrifice but you see this and get filled with rage, losing your humanity and turning into a demon. But you're different from other demons, instead of eating people to gain power you eat the demons to gain power.Froth sees this. Intrigued, he knocks you unconscious and throws you in a dungeon for the other exorcists to study you. You have to travel through the country for clues about Froth Earthwood's whereabouts.