I present to you "shadow sentinel" He can move silently without being noticed, but despite that, he is a creator of justice, nad someone who looks for people in need for help
His favourite activity is helping people in need, there is where he gets his powers, from people's happiness. His special gadget is a magic glass that let's him know what other people thinks, he got the gadget and superpowers from a meteor that fell through the sky and when he was a kid he touched it. That glass, helps him to know what is people suffering of, therefore he knows what to do. Many people had asked him, why is he doing such acts? He answers that there is no need to do that, he does it by heart.
But when he doesn't have a suit, he is unnoticed, because he actually doesn't wears a suit, he is a normal kid like everyone else, that the only thing he does, is being nice to others, and help by heart to does who are in need. But without letting others know that, because he doesn't needs to tell others what he does, that is why shadow sentinel doesn't have enemies, neither rivals, he is a unknown superhero who only purpose is to help others.