@dead_dreams28 suggested a story where Harry can see people's aura. Harry had the ability to see people's aura for as long as he could remember. It was something he found very useful since it told him a lot about the person next to him. He had read everything he could about it and knew what all the colors meant. One day he passed a man on a bridge and he panicked. His aura was pitch black. Harry knew exactly what that meant and decided then and there that he wouldn't let the stranger die. Warning: Mentioning of suicidal thoughts, depression, grief.