As are those working class fish cleaners daughters from Swansea, Wales. Which Fiona is. She married into upper class society when she married legendary adventurer Lord Montgomery "Monty" Fiziwigg when she was 25 and he was in his 70's. This was years before she ever became a Continental Operative. But by the time they met and married she was just as notorious as he was for her adventures--And for wearing men's clothing and the like.
When Monty was killed (mauled by a lion) Fiona's depression made her even more reckless in her adventures and becoming a Continental Operative gave her focus again and may well have saved her life.
Fiona and Monty's relationship was inspired by that Sean Connery/Catherine Zeta-Jones movie "Entrapment".
