Word of Rex
So, Word of Rex.
In the beginning, there was pie. This pie was the entire universe. It was that Jello Pumpkin Pie.
Then Haruhi imagined a world, and boom. Here’s everything.
What follows is the words writer of that world. Given not from a burning bush, but from a squid with glasses.
This is canon, yo!
Sly’s Eye / Hair Color
Even though Sly’s eyes and hair are red and blue respectively, the fact that those are also his favorite colors is a coincidence. Neither influenced either, and he doesn’t wear contacts or hair dye.
Batman exists in this universe as well. However, he’s in Gotham City, while the story takes place in Tokkou, a land in the ocean near Japan. Don’t expect him to show up, but it’s not out of the question.