I think Dreamstone probably has something to do with it. I mean, the Pendant interacting w/the Telepod is (seemingly) what started the whole mess for Crono & Co. That along w/the fact that Doreen, Masa, & Mune also (seemingly, again) come from Dreamstone (or at least Dreamstone refined artifacts?) seems to suggest that it has some pretty outstanding qualities, yes? Not to mention the fact that some of said artifacts seem to absorb magic...and where's Dreamstone come from? That's right, the planet...that's always made me believe that the trio are perhaps the Entity's stooges or something...*shrugs*
EDIT: Oh yeah, and like everyone knows, this whole "player=Entity" theory is one of the oldest (and easiest to debunk, as ZeaLitY proved already)...