HMMM that's difficult. i think valentin and essio would go for pulling the lever because 1. military has gotten them used to seeing people die, no matter if its just a singular person or 5 of them and 2. its drilled into their heads to save as many people as possible. too many of my ocs (eg. victor, cindy, gina, emily, susie and probably more) are too kindhearted to come to any kind of conclusion so they don't have any answer to the trolley problem. i honestly dont have any clue if any of my ocs have morals that would stand for not pulling the lever and running multiple people over but i think who comes closest to it would be robin. mostly because they're very distrusting of people in general so i don't think they'd care much how many people die in the end
more abstract answers though:
citro — he'd find a way to either stop the train itself or make it fly so it hits nobody
maeve: "kill the train driver. it'd stop the train at least" (ironic answer)
ashton: savior complex would make her want to find a way that involves absolutely no killings
rakio: would probably give up his own life to protect the people on the tracks ("""bodyguard duties""")
flynn and probably citro too: "if you're delusional enough you can pretend the trolley problem doesnt exist"
auro: would probably write a full on essay about the most ethical answer to the trolley problem viewed from each moral standpoint, only to then not have a clue what he'd answer themself