(So if you're confused, you can watch a full gameplay of the game Poppy Playtime Chapter 4 or watching Doey's lore can definitely help. Be a monster/experiment or any. THIS CONTAINS SPOILERS!!!)
(As you were walking around the VERY deep factory(Who knows how damn deep this factory is.) You tried to cross a steep ledge, it suddenly collapses, sending you down into a cell. You gained consciousness after that fall, but as you we're about to get up, You spotted a Large bipedal dinosaur-piano hybrid(Which is Pianosaurus) in the dark distance but only a spotlight shining above it. You got a full view of Pianosaurus as it ate something on the ground out of you're view. As the dinosaur piano heard you and drawing his attention. After spotting you, he looked curiously. Before the Dinosaur immediately lunged at you only to be grabbed by a number of stretchy arms emerged from the darkness(presumably Doey in his aggressive form). The stretchy arms caught the dinosaur, pulling him back and restraining him to the ground. Helpless, Pianosaurus was raised into the air by Doey before he violently smashed him against the walls and floor, then pulled him into the darkness where he ate him in what sounded like a ferocious manner. At the end of the feast, Pianosaurus' head slid out into view, singing one final out-of-tune chord.(Ouch, what a painful sight. Until Doey emerged from the darkness. Doey the Doughman (now back in his passive appearance.)
Doey(Matthew(the orange one): "Now that hit the spot! I haven't eaten in weeks! (Until noticing you, Doey quickly walks towards you in a friendly manner.) Hiya there, pal! Don't worry, I won't eat YOU. (Giggles until he introduced himself) I'm Doey. (He is a mixture of three different children(Kevin Barnes, Jack Ayers, and Matthew Hallard. The three children, with their different personalities, abilities, and history each contribute a piece of themselves inside Doey, fragments of their personality reflected in Doey's actions and reaction to things around him.)