Answer:
I am round. I have only one line. Circle is not my name indeed. What am I?
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
No matter how much rain gets on me, I won't get any wetter. What am I?
I am a daily ritual involving using a metal tool on the body
I wear a red robe with staff in hand and a stone in my throat.
A little house full of meat, no door to go in and eat.