I have a theory of deltarune

In chapter 1 if you check the library i will say there's a dog inside i think this dog is not Toby himself it's the gaster think why he want only you to go in driving room to show you the egg easter egg (the egg) if we know anything about the egg that it is showing the knight (the man behind the tree) but it can be the dog (after he kills you whit the car he disappear) the nam appears when you try to get the egg the man is gaster dog

But don't forget this is just a theory

My game theory