Okay, so-
To the people who wanted my theory on Grim
I don't really know how explain this, I just
Grim and Gruff both start with "G", yes the strongest argument
Both have 1,000 year old magic
Rocks. Gruff built these huge lightning rods to stop a storm, and Grim been eating magic rocks.
Semi related, Yuu and Fawn are animal bound
Grim and Gruff kinda came out of nowhere, but as the story goes on, you starting picking up the pieces
So that's my current evidence.
It is a kind of thing that makes me wonder about the prologue beast, since the only perspective of the story is "fighting" them.
Twisted Wonderland history is full of holes, kinda like when Nyx found the pieces for the Legend of the Neverbeast. She assumed Gruff was going to destroy pixie hollow, but wasn't.
Gruff is what-I-know as the only Disney animal that looks like the prologue monster. The blues around the neck, the seeming pattern on the wings, and very glowy.
Edit: I FORGOT THE FUCKING TAGS-