Disclaimer: I Joestar 11, do not own bleach Tite Kubo does, I also own no other anime, video game or book mentioned in this story, only MY Ocs.
Prologue: Cerulean
Hollows, said to be the greatest and oldest threat to the soul society, even before the creation of the 13 court squads, soul reapers alike have eliminated the threat too many time to count, hollow are saw as impure beasts that feed on other innocent souls as instinct, hunger, or (even sickly enough) fun, soul reapers do not do so which is why they are seen as the protagonists the kill hollows, save souls, and transport the souls to the soul society.
This is how things have always