Having lived its life completely sheltered from all danger and negativity, it aspired to become an originator, just like the one that created and cared for its world. However, when it accomplished this, only then did it learn the horrifying truth, the finite nature of reality that had been kept from it for so long.
Has no idea how to even comprehend most of this, nevermind how to explain it to the inhabitants of the world it created, who look up to it as a deity and a guardian. Horrified that it had been lied to for its whole life by the originator of its own world, it could not bring itself to lie to its own creations in that same way.
Barely coping with anything, but puts on a brave face in front of the inhabitants of the world it made.