If the Forest Talker cooperates with Vasiliy and at least offers him some valuable information, he's going to keep his word and advocate for the Forest Talker to be entirely released.

If the Forest Talker doesn't cooperate, he's going to advocate for him to join the Interlopers.

But either way, for once, he's going to emphatically express an opinion instead of staying silent—they cannot kill this man, and keeping him prisoner until he dies is torture, which is the realm of people no better than animals.