What is a soul?
The core essence of what made us human?
The spiritual aspect of a living being?
Or just the next step of growth a person experiences after one dies?
Just like a child grows from a fetus to a baby to a child, then after death, it becomes a spirit, not of this world.
But to Blue Lotus, their understanding of Soul was different.
"If a soul is a blank book, then the memories and experiences are the ink that are stamped up on it, becoming a true spirit."
It was the belief they held, treating the spirit, an amalgamation of soul and memories as nothing more than a book.
A book that gets reprinted each time it goes into reincarnation cycle, losing all its ink and what it made a person. Before taking in new ink to become someone entirely else.
And to most of the world, the lost ink can never come back. Once one goes through a "reprint", the lost text on that book can never be recovered.
Turning it into a death, but not a true one. For a soul is ever immortal.