Subaru dies so many times in the shrine that it makes Satella return to subaru until the point where subaru first comes to lugunica
Subaru quickly notes that things are different and when he meets Emilia he is confused to learn that she is no longer Emilia but someone sadistic and evil reminding him of Elsa
Subaru comes to the conclusion that it is his fault that not only Emilia but everyone he knows has different personalities from each other.
As you have read, satella causes a reboot causing the re zero characters to exchange their personalities, well, points must be clarified
1: The personalities of the characters have changed with those of their killers in past loops now Emilia has the personality of Elsa or Rem with petelguese (very stoned)
2: If the person has not died in a past loop, only his personality will turn against him.
3: Subaru lost all interest in Emilia because he would be practically trying to flirt with one of the people who killed him
4: Subaru blames himself for twisting his friends' personalities
If you have made it this far, thank you for taking your time to read this.
Comment what you like or what you would change
without more I say goodbye
