You probably don't know any of my OC's but i'll explain anyways;
Dono (OC) would try to "pull up a Kirby", but fail afterwards as he doesn't really have much control over his powers
Emanuel and Adrian would be the ones trying to outrun the Light, but get hit anyways
Sam would try to take cover behind some rocks, hide inside some cave or try to just evade the Light as much as possible, but probably also fail
Jacobo would try to fight it, probably would end up escaping, kinda 50/50
_name gets hit while trying to evade It
Yazoba just kinda dies
And Lara would probably "pull of a Kirby" as well by using some of her tech, but having a better success rate than Dono (OC)
As for how would they try to fight Galeem.. nah bro idk if that's possible UNLESS they're in a group, but since it's a "every man for himself" well...-