Izuku Unohana: Substitute Soul Reaper

The spirits of the dead are real just as they are always with you. For as long as anyone can remember, ghosts have always been able to materialize in the physical plane of existence, making their presence known to everyone in the world. However, with the existence of good ghosts come bad ghosts. Evil spirits known as Hollows have existed just as long as normal ghosts have. Their appetite for souls knows no bounds just as their hunger for living souls. To that end, warriors, wielding powers beyond normal comprehension, have sworn a duty to protect the souls of the living and dead against these monsters to maintain the balance of souls between worlds. These warriors are known as the Soul Reapers.

Years later, Quirks have begun appearing within society and have made up 80 percent of the world's population. The remaining 20 percent are still without power and are deemed "Quirkless". However, half of that 20 percent are given the chance to become Soul Reapers with the help of the existence of "Spirit Quirks" as society has dubbed them.

The Soul Reapers work in allegiance with the Japanese Government and the Soul Society (the world as they know it as well as the plane of the afterlife) to protect the world against the Hollows.

One day, a young boy was born to a former Soul Reaper Captain and a Quincy (warriors who destroy Hollows using Spirit Energy bows and arrows) who was just radiating with pure spirit energy. The happy couple thought their lives were complete when they were suddenly under attack by a surge of Hollows who had come for the boy's spiritual strength. The father and mother were murdered by the horde, leaving the boy at the mercy of the Hollows before the other Captains of the 13 Court Guard Squads came to the boy's rescue. Captain Retsu Unohana, feeling sorry for the young infant, took it upon herself to raise the child as her own. This is the story of a boy who desires to become the number 1 Soul Reaper and protect others from harm.