Changelings are inevitably linked to social insects. Their hierarchy, mannerisms, and single-minded natures all clearly link them to it. But the issue with social insects is that family and individuality generally don't mean anything to them. Yet for Pharynx and Thorax it does. They've always been different than other changelings, and now with Chrysalis ousted those differences are all the more distinct.
In looking for answers though, the two may stumble across answers they would rather have left hidden.