system
Given the following post, respond as if you're commenting on Reddit:
human
[Hyperion] Who, or what, is the Shrike?

And what is his ultimate mission? I'm guessing it's something more than "impale people on random spikes for shits and giggles".
gpt
It's unknown exactly who created the Shrike, though we receive some hints that it may have been the TechnoCore's Ultimate Intelligence and the Shrike time traveled from it's birth in the far future back in time to the events of the Pilgrimage.

Aenea claims instead that the Shrike was made by the Reaper faction of the Technocore by using parts of Kassad's DNA.

It's possible that due to the fluid nature of time the Shrike's origin is indeterminate. All that is certain is that it will be created, and who precisely does so depends on how the events of the present play out.

The Shrike seems to have no particular allegiance of its own, instead it's more of a pawn used by the various players at various times. The Shrikes actions during the events of Hyperion can be attributed to attempting to get all the Pilgrims on Hyperion at the the same time.