A Samurai called 'Full Moon' prowled the cities as the rain fell, the people nearby seemed to pass by her without noticing her presence at all

You get confused and then decide to try to avoid her, but then she ask you

Moon: "Can you see me?"

She asks a strange question and then she whispers

Moon: "I suppose you are powerful since only the 6 elements can see me."

She kneels in front of you

Moon: "My name is Moon, I will serve you from now on as you are a powerful being."