Castle in the Sky - Sheeta's a ROBOT?! (Maybe?)

Okay, so I just watched Castle in the Sky (totally random, but I was bored lol). It was cute, I guess. The whole flying castle thing was pretty cool and the robots were kinda scary-cool. But something about Sheeta, the girl with the glowy crystal, is bugging me. Hear me out: what if she's, like, a super advanced robot or cyborg or something? I know, I know, it sounds crazy. But think about it. She survives falling from a HUGE height at the beginning. Sure, the crystal helped her float, but she still landed with a THUD. Then there's the whole thing where she can, like, talk to the robots in the castle gardens. Maybe it's not talking, but she seems to have some kind of connection that Pazu doesn't. Plus, she seems almost too good to be true, right? Always calm and collected, remembers old family chants... it just feels a little too perfect, almost programmed. My theory is that her family, the Laputans, were really advanced in robotics, like REALLY advanced. Maybe they didn't want to die out completely, so they created Sheeta as a kind of living (or pretending-to-be-living) archive and guardian of Laputan technology. The crystal would be her power source or something. It would explain why everyone is after her and the crystal - they are the key to unlocking all that lost tech. I could be totally wrong, of course. Maybe she's just a descendant of a powerful family. But the robot thing just makes the story a little more interesting, right? What do you guys think? Am I totally reaching or is there something to this?