#I also believe that Rune purifying the Beasts also purifies their spirits but until he gets there it's a corrupt and painful existence

[changeling-rin]

Can Steam see the spirits of the Champions from BotW after Rune clears their respective Divine Beasts? How does all of that work?

I believe that Steam would be able to see the Champions until they move on, after Rune defeats Calamity Ganon. But I don't think that cleaning the respective Divine Beasts would have any effect on it, personally. I'm pretty sure that the Champions are trapped in their respective Beasts until Rune cleanses it and frees them, so if Steam were to be tagging along, he would absolutely see each of their spirits there.

They'd probably be horrifically entangled in Malice, to match the corruption of their Beast, but I believe that they'd be there and that Steam would see them.

...and be subsequently horrified, but that's another problem entirely