Okay, I wasn't going to post hints, but I can't resist.
So....keep checking back in this thread for updates!
Mojo's Buddy:
Is a sweet girl that is younger then him, they are about the same size, she has a sibling (or two), and where she lives was colder than where we live today!
LilyGrace's Buddy:
Is a cute little boy that is younger then her and smaller then her. He has a sibling (or two) and where he lives was warmer than where we live today!
I have most things ordered and are picking up a few more things tomorrow!