Tiny Chat People

That's a strong conclusion to draw based on the absolutely nothing at all we know about events that happened in the world outside of this game we were born into.

We know that Spit is notorious for cruelty, and has killed another God. The consensus seems to be that Rein is tasked with keeping Spit reined in (get it), but it is also important to note that Rein is protecting Spit from execution in doing so. The question lies in what Rein's motivation for protecting Spit is.

Are they a naive innocent, blinded by idealism, thinking they can 'fix' a dangerous monster?
Or are they the puppetmaster, using Spit to eliminate a rival behind the curtains while playing the hero on stage?