Responses
Exactly she is both she was at first a possessor and after that she repeat time again and again.
Isekai Transmigration + Multiple Regressions is how I have it tagged. I love multi-regression stories, and they’re still on the relatively rare side.
...is she a reincarnator, transmigrator or possessor? I believe she's from Earth then became a blue whale inside the book and died then live again...