Who is the dreamer of several layers of dreams in Inception?

I started dreaming on the plane. The dreamer was a pharmacist. After entering the first dream, the pharmacist became a person to remind everyone to kick, and stayed on the first floor. Arthur started dreaming in the van, so the dreamer on the second floor was Arthur. On the second floor, Arthur became a kick for everyone and stayed on the second floor. Yi Musi started dreaming in the hotel room, so the dreamer on the third floor was Yi Musi. On the third floor, Ames became a kick for everyone and stayed on the third floor. The fourth dream is Cobb, and Ariadne enters the fourth.

Note that although Ariadne designed this dream, it is not her dream. Ariadne was never a master of dreams. She was asked to build a dream because Cobb was afraid that his wife would destroy it.

The defender of the first layer is the subconscious of the target Fischer. And all the guardians are his, except for Cobb's wife Mal on the third floor.