What Little Will just said, made both Nova and Fiona understand that the Devil who captured Juan wasn't an easy foe.
He must be a super old, and cunning Devil, one that had also possibly corrupted Juan into signing a contract, one that surely couldn't be broken.
At least without paying a certain price...
"Don't get me wrong, I also wish for you to get your friend back, but it seems impossible. Not to mention that when you met him, he wasn't forced in any way. It was his own will that took those decisions.
The Devil probably took over his body in advance because he was afraid that you'll kill him. This means that there could be a slim chance of him being alive.
But I wouldn't put my hopes into that."
Little Will didn't sugarcoat his words at all, in a way, this was the best. So Nova wouldn't have to got through the pain of constantly thinking about Juan's whereabouts.