The Decorative Saint Awakens to Her True Power

Long ago, the Kingdom of Elbart prospered thanks to the blessings of the spirits and the deeds of the Saint.
But as time passed, the Saint’s figure disappeared from the temple where the spirits were worshipped. In her place, the one entrusted with the Saint’s duties is Sylphia, the “decorative Saint,” a mere figurehead. She is confined within the temple and tormented by the true Saint, yet she earnestly continues to carry out the Saint’s role as a substitute. Then one day, the spirits suddenly appear before her.

https://www.cmoa.jp/title/309364/