Dean Winchester as a Homestuck troll.

homestuck troll!dean

Dean is cosplaying Homestuck and is telling Sam not to shoot him, as he is not an actual demon.

dean cosplaying eridan, but sam is pretty sure hes a demon

cas cosplaying as some hamsteak character while sam thinks hes a demon

Someone yelling "Demon!" and pointing, but it is just Cas in his homestuck cosplay?

Sam and Dean thought Nepeta was a demon and now she's pissed.

Nepeta was mistaken for a demon. That's rude. >:(

homestuck aka not a demon