I was cleaning out some files and I came across my notes on the Fire Emblem translation I made to prove they weren’t talking about Tharja’s hair as someone claimed on one of the Nintendo forums.

サーリャはバインバインだね
sarya wa bain bain da ne
Equiv to something like: Sarya goes boing boing doesn’t she?

ノノ、何よ穾然。。。？
nono, nani yo totsuzen…?
Nono, what, so suddenly…?

だから、　サーリャはバインバインだね。
dakara, sarya wa bain bain da ne.
So/therefore, sarya goes boing boing, right?

バ、バイン。。。？　何のこと？　呪文。。。ではなさそうね。
ba, bain…? nani no koto? jumon… dewa nasasou ne
Something like:
B-boing? What thing? What kind of nonsense is that?

まったく意味だわからないわ
mattaku imi　dawa karanai wa

サーリャはね、　お胸もお尻もバインバインってこと！
sarya wa ne, omune mooshiri mo bain bainttekoto!
Sarya’s big butt and boobs go boing boing!

—-> Nono is talking about Sarya’s breasts and butt. Using respectful o-mune and o-shiri, probably in reference to their size.

。。。っ！？
…basically an surprised exclamation.

So, there you have it.