Shadow warrior 

The shadow warrior was created as a perfect ninja he he could reappear and disappear, using shadow and light that dance is all around him the perfect assassin, the perfect killer for higher He only pees in the shadow and disappears in the light. He lives in the shadow and there's more of him others like him that have been trained that are perfect without flaw, killing effortless and taking down their enemies. The shadow warriors are called in to do what others cannot to get the vengeance for others who cannot get it for themselves they guard and protect those who they work for. Shadow ninjas do not use their names. They barely speak at all. They're not known to talk to others, but they are known to use hand, gestures, and sign. Don't mistake the shadow warrior they do talk to each other on rare occasions when they have something to talk about, but only to each other in secret and undercover of the shadow. This is their realm their domain because if you choose the shadow warrior, you cannot go back against your word  The shadow warrior is found to the queen and the queen is bound to the shadow warrior