Congrats on finishing the main story! I may have not seen the whole thing, though the bits i saw is excellent! Great usage of controlling the AI members, clean Unison triggers, along with having some nice party variety! I sure hope we find out the name of that tree one day~ ;D
I always assumed it was something like "Hope." It's supposed to be the bridge between the worlds. Though I've always secretly hoped he just called the thing Bob.