WMG

A.K.A "Wild Mass Guessing". For more information, visit the TV Tropes page.

This is a place to put random theories and speculation, purely because I think that would be a fun page to have.

Rio

 * It's entirely possible that Rio has had some military or police training beforehand. She is very comfortable with firearms of all sizes to the point of being able to spin them around Han Solo style. She also mentions having tasted food rations before. In addition, she's clearly very flexible, can run for an indefinite period of time, has perfect balance, and can hardly make decisions for herself. I dunno about you, but that sounds like the perfect soldier to me.
 * It's worth noting that Germany made military service mandatory up until 2011. Depending on when Rio made her move to Japan, it's possible this is the reason she's so skilled. Granted this doesn't line up at all, as Rio would hardly be a teenager by 2011, but Lifeline is a game from 2003 and the writers clearly didn't have Deus Ex levels of foresight. According to Lifeline's writers, we're still going to be using landline phones, flip technology (though that seems to be making a comeback), and asking each other our signs as a way of flirting in 2029. It's 2020 at the time of writing this, so feel free to say "told ya so" if I'm proven wrong when 2029 rolls around.
 * It's worth noting that Joe Powers is a self-described skilled marksman. This supports my theory, as the only other explanation is that guns are just really popular in Germany for whatever reason (I don't live there so I don't know).
 * Besides the childhood trauma of seeing her father shot and killed in front of her, and assuming her mother was also killed, it's possible that Rio grew up to be so antisocial because she was ostracized for being mixed race after escaping to Japan. This would make sense, as she clearly has body issues (refusing to eat a donut due to the calorie count, and having an aversion to scales) yet takes shit from absolutely nobody.
 * Speaking of which, how come Rio doesn't recognize Joe Powers? I think there's three possibilities: either Rio never saw his face (she definitely remembered his name, though), Rio was around the age of two to four years old at the time (it's impossible for most adults to retrieve memories around that age. Try it!), or Rio's memory is simply fuzzy (try as I might, I cannot remember the face of my kindergarten teacher.)
 * Looking back on it, Rio was most likely a teenager when she was shot, seeing as she was able to flee to Japan all on her own. Rio's probably simply bad at remembering faces, since she instantly forgets the operator's face and Kraft's english surname flip-flop is more than enough to fool her.
 * Rio probably grew up in Germany before she escaped to Japan. How do I know this? Well, Joe Powers is German, and Rio's mom is German, so it makes sense that Rio would also be German. There is the possibility of them being Swiss, though, as Rio's father set up a Swiss bank account for Rio and her mother to live off of. Though rich people storing lots of money in Swiss bank accounts isn't unheard of, and is in fact really common.
 * Tangential to this, Rio probably grew up pretty cozy until her father kicked the bucket. I don't know how much magic scientists get paid, but apparently it's enough so that you can support a wife and a kid and have enough left over for that same wife and kid to live off of comfortably. There's also the possibility that Rio's family simply lived far enough below their means that this amount of saving is possible. Maybe Rio's dad knew he was going to be killed eventually. Either way, money was no object for the Hohenheim household.