Wings

You can see people's wings. As far as you know, you're the only one that sees them. But you don't mind, as they allow you to gather more insight to everyone you see. They vary in size and colour, and you can tell a lot about people from those two aspects alone. They move as well, stretching out to hold a loved one, or flaring when someone not o cherished comes by. You've never seen anything physical be able to interact with them, but today, you see someone with two charred stumps where their wings should be.