Well, Cecil's father was a military man, but he's retired.
Her brother, however, is three years older than she is. So he's 25 - I'm thinking he'd be a Brigadier, and possibly be a first mate on a ship - possibly a captain. I'm not so well versed in military ranks so I'm probably way of xP
As for coat of arms, you mean that thing nobles have? Because her brother would use the family Coat, in that case. Either way, I've decided on English military.
Well, she already goes both ways~ ;P
I do like that though. Her father is now English, and her mother is French xP