[The hustling intensifies, and Phoenix keeps looking back frantically to make sure there's still a good distance between them and the monster. But at her question, he just manages a shrug.]

I don't know. Science? When you live here long enough, you start to stop questioning why certain things are alive... [It helps to save on sanity.]

As for what it's doing... Well, either we're food in some way, or it just sees as some sort of trespassers that need to be destroyed. How does that sound?