According to the Goblin Elder's plan, Christopher would run to the river and throw something into it just before Elsa and the others were eaten.
The River God would then temporarily suspend his punishment of Elsa and the others, fly over, and ask Christopher what he had dropped. After that, Christopher only had to say he had dropped nothing, and he would be able to take Elsa and Princess Anna away safely.
As for whether to save the prince, Christopher had not decided yet. He did not want to be a bad person, but he did not want to go against the elder's instructions either.
Lost in hesitation and confusion, Christopher had no idea that Andrew could hear every one of his thoughts.
So that's how to break out of this situation. In that case, I made the right choice. After all, Elsa and Princess Anna would never abandon Snowman.
Andrew thought to himself that, since the ready-made solution was unusable, he would have to come up with his own.
Come to think of it, I didn't expect Christopher to be as honest and kind as he was in the movie. I'll have to treat him differently, then. I originally planned to use Illusion to make him hand over his soul, but that won't do now. He's a good person, after all.
Whether one was a person or a Demon King, one needed a bottom line.
"Your Highness, what are you thinking about?"
Seeing Andrew lost in thought, Elsa asked softly. Gazing at the lovely face so close to his own, Andrew felt his heart stir. "You."
Elsa immediately blushed. Looking at the pair of "shameless lovebirds," Princess Anna gritted her teeth. "Watch yourselves, you two. I'm still here."
Elsa blushed even more, but Andrew was unbothered. "Understood. Next time,