I HAVE REASON TO BELIEVE THAT MR.GREEN IS ACTUALLY THE "Daddy" CHARACTER THAT ZOE KEEPS MENTIONING! you just have to look at the image closely, I thought old Elmo was just on the heart, but looking closely, I can see eyes, an Elmo hat, and hair, all of those things look like the shape of this person, who I assume is Mr. Green, because in the image on the right, it's a tweet that says "take them to my greenhouse" above the image, and in the end of chapter 1 after Biggy runs over Ben and Jerry with a tractor, a character says, "take them to my green house" and the text is green, and the chapter's name is "Green's Manipulation" and a couple images imply that chapter 2 might take place in the green house, and if that's true, then big bird/Biggy must've thrown Ben and Jerry in the Greenhouse, that would only indicate that Mr. Green must be the entity known as "Daddy"