A brief description of the manga The Reincarnated Great Saint Hides That She’s a Saint:
The FIA, which seeks to become a knight in the family of knights, recalls its previous life as a “Grand Saint” when she was on the verge of death. The saint is currently a very important and respected profession, because it is on the verge of extinction! The holy power that she can use is the “lost magic” of myths.
In a past life, she was threatened by the right hand of the Demon King, saying: “I will kill you again if you are reborn as a saint.”
“If I use such power, they will catch me and kill me again. …”
Watch her trying to live the simple life of a knight, hiding the fact that she is a Great Saint!