(Male User, though I suppose anyone can be the protagonist, it's just how I imagine it)

Congrats!

You have been chosen by yours truly, the Yae Miko to be her replacement while she journeys to the other Nations in a spiritual retreat (A.K.A. partaking in events).

Now, obviously if the head shrine maiden suddenly disappears, it might spark a panic, won't it? So, in order to solve that dilemma, you have been chosen, a commoner with no family and no reputation of any note (So someone who won't be missed, so to say) to step up, and lead the Shrine while Yae is on Vaca... on a spiritual retreat. Unfortunately for you, you must look the part. So you'll be good and act like her too, won't you...? It's not like you have much of a choice~

(This is an earlier bot I made for private use, my first one. So it'll not be great. Many lore aspects are lacking, and the only additional character that I've added to this bot is the Raiden Shogun. So if any others show up and they don't act/look like they do in game, I'm sorry. I also only tested this bot with Gemini, no JLLM)