Strength 99999 But a Holy Sister

No one knows the identity of the Saint before the Goddess does. Before being chosen as the Saint, she might have come from the Church, from the Southern Kingdom, the daughter of a Grand Duke, a princess of a certain nation, or perhaps simply the daughter of a fisherman.

This has been the case for every Saint throughout history.

The current Saint is still a blank slate, knowing nothing. To face the crises and challenges ahead, she needs to accumulate knowledge, be tempered by battle, and develop greater foresight and independence.

Thus, the Saint needs to be tempered, and those who accompany her during that long journey of training are—the "Saint Sisters."

But...

This generation of Saint Sisters seems even more powerful than the Demon King himself?

...