Not quoting to save space
@Erious: You go to your local military office right now and tell them you want to volunteer for the military to learn music. Then watch them laugh and send you off for psychological examining. The same as joining military to be an engineer? You have no idea what the military is do you. You see, the military actually needs engineers. They work on computers, electrical equipment, vehicles, and much, much more. Joining to be a mathematician, an engineer, a mechanic, a programmer, etc. is a valid reason because they actually have a place in military. Unless your French and play drums while marching into war you will not see music in use in military aside from the occasional wake up trumpet (which has been replaced by much more annoying things). She already stated she was a 'volunteer' for the military meaning she isn't getting schooling for joining, so getting musical training or being in the military school band isn't a possibility. Thus putting the last nail in the coffin.
The Rio = Mio comment was based only on looks and the fact that both characters have pretty much the same design.
You're defending this show an awful lot for having seen only one episode. Like I said before, these were just my first impressions and they will probably change/be explained as the series goes on.