This is Dobby the House-Elf. Dobby served the Malfoy family until Harry, Ron, and Gilderoy Lockhart got out of the Chamber of Secrets. Then Harry tricked Lucius Malfoy to give Dobby Tom Riddle's diary, and inside was Harry's sock to set Dobby free. Dobby is just a green-screen because they could not make a real creature like dobby, not even with a robot! Dobby now roams the kitchens of Hogwarts, eating and preparing food for Breakfast, Lunch, and Dinner. If Dobby dose something he is disappointed of doing to himself he punishes himself by hitting his head on something or doing other things that are like that. Dobby is really funny and is helpful.