I'm going to attempt to prove why George is Beatrice.
Weak evidence:
*Willing to oppose/kill the whole family
*Very possible for him to give Maria the letter
*Is the oldest of the cousins and the smartest, probably found a lot about the island from his many visits
*He's George motherfucking Ushiromiya
Episode one theory:
Will form one later tonight. It's worth pointing out that George survives for a extremely long time though.
Episode two theory:
George Survives for a long time, may have killed Gohda and faked his and Shannons death.
Episode three theory:
George was in the parlor, and since no one was there, no one could see George getting up after faking his death. He killed Nanjo because he suspected Nanjo killed Shannon, he later fell down some stairs and died.
Episode four theory:
George arranged for his fake death using Kinzo's preserved corpse. He also brought hair dye, because he's not stupid. Forced Jessica to phone Battler saying that by the time he got there she would be a corpse with half her head blown off to make Battler believe there's a witch. He then forced Jessica to throw her voice so he could pretend to be Beatrice.
I'll polish my theories much more later today.