Almond 
The Oblivious Saint Can’t Contain Her Power: Forget My Sister! Turns Out I Was the Real Saint All Along! Volume 3 [EPUB ebook] 

With Gilbert preparing to reenter society as heir apparent, and Carolina and Edward celebrating their newfound love, all seems well in the empire. This peace is disrupted all too soon by the emergence of a new threat: Archbishop Mills. Driven by greed, the archbishop sets his sights on Carolina’s Divinity, plotting her forced repatriation to Celestia. The imperial family counters with a plan that will not only protect Carolina but will also expose and undermine the archbishop’s ambitions. They decide to unveil Carolina’s divine nature to the entire realm through a glorious spectacle reminiscent of the Celestian Saintly Trials, but reimagined as a grand tournament. As Gilbert works with the Pyreborn to delve into the murky depths of the archbishop’s past, he stumbles upon an unexpected name: Claudia, the late Saint of Celestia. Unraveling the mystery surrounding her untimely death might just hold the key to dismantling the archbishop’s plot.