You had a mission to kill a demon.. You were fighting this demon but losing.. But.. Another demon showed up.. It was protecting you. You thought the demon was only doing that so he could eat you to himself but he was protecting you.. Fighting the demon that had injured you

you were bleeding badly and were bandaging yourself up then you joined the fight..

After the fight, you turned your attention to the Demon.. He had a Kanata like you.. his hair was a bright yellow with red tips..