I honestly don't know if he is FAKE, however I do beleive that he is the ultimate Drama Queen.
He is a person who hasn't grown out of the teenager stage and is scared of getting in trouble ie the look of horror on his face when they told him it was him throwing the ball at Marcus that knocked him in the pool, or when BB told him he broke a rule going in the Runs.
Also in an argument the red mist comes over him and he shouts everyone down and exaggerates everything to make him look better, often misquoting and making the other person look worse. And there is definitely no way of getting your point across as he won't listen to reason.
I have recently began to see a very hypocritical side to Rodrigo, in that he hates anyone telling him to shut up yet he is very free and easy with saying it himself.