Jack's Links
This is... a bit of an awkward subject.
On one hand, Jack is just some poor child that mad scientist Thiessen got ahold of, and no child deserves to be brainwashed from birth into being that horrible woman's slave and only fed by her will.
On the other... after kidnapping Alise, biting his foot, and making his ears bleed to the point he lost his hearing for an hour, he's not exactly inclined to be nice to the thing.
While Esrey may have nearly crushed Jack's throat in retaliation and had him taken prisoner, he also allowed for the child to be released under Alise's care in hopes of letting him start a new life. He's not the most friendly towards him because of their little clash, not to mention his tendency to dislike interacting with children overall, but he's willing to at least... try to get over it. If the kid shows improvement and doesn't cause any further trouble. At the end of the day, he pities the thing for its horrible situation, and he genuinely wants Jack to be able to realize that Thiessen is a cruel caretaker and that he deserves a better life than with her. But that's for Alise to do, because he's got little concept of how to talk to this one, even though he'll be stuck having to keep seeing him in her home.