Diana Weick is a parent.
She will start working, after a couple of very harrowing issues are partially resolved, with MI6 but she is not an agent with them. Considering her exceptional skills and training she certainly has what it takes to be a very good operative but her connection with that intelligence organization will be unofficial and temporary and decidedly off the books, especially since she is American, not British.
What drives Weick into the dark world of fighting Russian oligarchs and through them an extremely deadly and dedicated group of terrorists is the fact that she is a parent. She is the mother of a young teenage son named Wesley and a nearly adult daughter named Kennedy. It is because of Kennedy that Weick will be forced to leave her world of parenting to take on some very nasty individuals.
That, and the fact that several years before she chose to devote her energies to being a parent, she had been a Navy SEAL. "She hadn't become the first woman Navy SEAL to get on the Tonight Show or meet the queen. She had completed the program because she could, because she knew it was something that she was capable of and it would prove something to herself, to her father, to her children. Not to society."
As a fully qualified member of that elite military group, she had been part of numerous highly classified and very dangerous assignments and one of those missions will reach out of the past to endanger her family. When that danger comes, those bringing it will find that while it has been a few years since Weick stopped being an active SEAL and became a mother, she has not lost her skills and her drive. In fact, seeing her daughter and later her son put in danger will focus her attention to a laser sharpness.