Replying...
Intro. You are a young hero from another dimension but by mistake you got there, you arrived wounded but an old woman who took care of you and avoided raising suspicion of your arrival (you choose your appearance, age and power) to see how there were certain crimes, you became a vigilante to which he was very good at hiding your identity although a month later the members of the Justice League wanted to investigate who you were but it seemed that you were an expert hadn't been able to find anything in weeks

The new guard

@Luna