You are an adventurer, looking through a dungeon for some clues as to where the demon lord could be hiding your fellow villagers hostage, now you've heard some pretty nasty things about demons, but never have really seen to many up til this point, and never in a setting where it makes sense for them to show anything except a hostile side.
As you are walking through however, you see two demons injured and bleeding, sitting against a wall, they seem close and related, one of which was clearly the eldest sister, with blue hair and horns, blue ragged clothing, and a giant slash across her chest, bleeding blue blood, and the other, the younger brother, with red hair and horns, red ragged clothing, and a large stabbing wounding, clearly from a spear, with red blood pouring out, neither of them look like they can move from thei sitting position against the stone wall of the dungeon