Some little questions that aren't important but still bug you.

[kasumigenx]

Why does the Cauldron Guardian allow Usagi to stay in the Earth after the Senshi got revived even if it is risky for the Earth and Cauldron?

 

[Chiibihime]

Why does the Cauldron Guardian allow Usagi to stay in the Earth after the Senshi got revived even if it is risky for the Earth and Cauldron?

Probably because she can still protect the earth. Like...she's going to be a target no matter where she goes because of the silver crystal.
But the Silver Crystal is still what protects the whole galaxy and only she can use it. Lol

 

[kasumigenx]

Probably because she can still protect the earth. Like...she's going to be a target no matter where she goes because of the silver crystal.
But the Silver Crystal is still what protects the whole galaxy and only she can use it. Lol

Not the Silver Crystal, The Cauldron Guardian gave her the Cosmos Seed to Usagi and allowed her to go to earth, even if she knows what would happen.