Not really. There are just so many of them. The amount of relevant lore is overwhelming.

Ah, got it! "The Aum staff possesses the power to resurrect fallen allies, but can only be used by a princess."

Wait, listen to the rest.

"However, this fragile staff must be handled with the utmost care, where the player has to exercise discretion in choosing units to revive, due to the staff only having a weapon durability of one."