Imagine Reisen being playable in Fossilized Wonders, and there's a specific "Hidden Ending" for her if she maybe loses to Toyohime and she's back in the Lunar Capital with the other Reisen.
That aside, I really like this reason for Reisen to visit the shrine – that Eientei supplies the first-aid kit for Reimu. Open for shipping dynamic even – imagine Reisen being the one who primarily tends to Reimu's wounds.
