As for Olivier's age, I doubt she is over 50, even 45. A couple of reasons for this.
-She doesn't look it.
-Roy even jokingly flirting with someone who is 15+ years older is a little weird, and would probably not portray the image he's trying to make quite as well. At that point he looks more like a fool or a suckup than a ladies' man.
-There is a possibility of Arme(?) and Strong-ko(?), Alex's two older, similar looking sisters being twins. It would make the most sense, since you have one babe of a daughter, two... dudes of daughters, a son, and then another babe of a daughter, if they were identical twins. Anyway, so that can give Olivier a chance at a smaller age gap between herself and Alex. Heck, theres even a chance Alex, Arme(?) and Strong-ko(?) are triplets of some type. It's farfetched, but plausible from what I see.
-Alex looked very young in battle. Perhaps 25 or so, placing him around 32. This is all estimation. Though I have a hard time seeing him as much older than Roy, both now and in Ishbal.
Now this is really bugging me and I'd like better evidence to figure out her age. In all honesty, she looks 30.
