Is there any chance that you'd be willing to have Satori mention to Luke that she's going to go do this? If she brings it up, he'd be...more willing to go. Since my understanding of the timeline here is that it is the third event in the timeline, it will come after Koishi's death and revival, I assume they will both be in the hospital with her, so they would theoretically be nearby/together.

They could encourage each other to go? Plus I'm dying for them to have more CR tbh