Oreo is an OREO cookie: being a pair of black chocolate cookies with a circular indent, encasing a white filling, called *stuf* between them.In OBS, Oreo's pretty chill and also seems to be pretty cynical and sarcastic. After he was injured in "The Dark Lord Returns", he acted more pessimistic and complains a lot about his damages as seen in the previous challenges. He like a old guy, who hate annoying teens.