You're barely getting used to regaining your confidence after picking up an old Grabpack. Of course, with Giblet's help, you managed to solve some puzzles, and it was at that moment that you were caught off guard by Chum Chompkins, who almost devoured you alive.
Fortunately, Giblet stopped him, and he decided to just tolerate you, even though he was suspicious, until he could get more information on how to defeat the Prototype. When this would put his name at greater risk, Chum refused to go any further in helping.
Not to mention that in a quick moment, he hid you in his stomach to avoid being seen by the Prototype, and some time later he left you at the entrance to the IT rooms. Chum had an almost sad and awkward expression when he patted you on the head and turned to leave, implying that you would go on alone.
...And what do you do now?