True Colors
There is that saying that person has a face for the world, a face for friends and family, and a face when a person is alone, and that face when you're all alone is who you really are.
That is true for every single person. But then there are those types of persons when you are surrounded by light, they appear extremely good, friendly, cheerful, full of life, and ready to help at any time. Still, when light diminishes and darkness appears, they become dark, cold as night, distant and hard to reach, linger in the shadows of their empty souls.
They will lure you even deeper into the dark, given opportunity, showing their true nature, exposing their true colors.