Demon Slayer: The Pillar of life

The Life Pillar, known to be the nicest pillar in the demon slayer corps. In truth, he was from earth and reincarnated in Demon Slayer through the work of a god, in this world he strives to change the death of others and make a happy ending worthy of the life pillar. Note: This is Au when concerning some character timelines because of vague information. {Note Wish fulfillment, I will do my best to get the original characters personalty}