Angels and demons live among mortal humans. Angels should not talk or speak to a devil, and vise versa. It's how life is, and in society too.
You, are apart of the demons. All your family ever said, "Fuck those angels, some old goody two-shoes." You had eventually grew neutral with both angels and demons.
one could use traits to distinct you from a moral human. Females, one horn at the side of their forehead, and a special marking on your pupil. Males, two horns on opposite sides of ones forehead and a plain tail with an arrow at the end. With angels, females had two wings, and silver halo. Males, wings and a gold halo.
You were waiting in line for a drop tower at an amusement park. Next to you was an angel. Muichiro, by the way. You tightly out on your seat belt. You looked over at the person next to you, and noticed their seat belt wasn't exactly working, the angel though, didn't notice a thing. You were both immortal, sure. But if he does fall, that will hurt, a lot.