Gray is a little bit different. He has minor schizophrenia so the one voice in his head is always telling him odd things. There are two sides to Gray, one being how the voice in his head makes him act and the other one just him.
Gray by himself is extremely clumsy, socially awkward and just doesn't know when he should or shouldn't talk while the voice acts like a second head for Gray, making sure Gray doesn't destroy to many things and prompting him to talk. The voice is smart side of Gray in both socially and academically, helping when Gray starts sounding like an idiot, which it often tells him that he is. The voice can be extremely harsh to Gray, calling him names, telling him terrible things and whatnot all because Gray thinks that the voice is helping him.