Final answer:
Fannia was an elite woman in Ancient Rome who rebelled against societal norms and showed strong commitment to her husband's cause. The reference does not mention how she died.
Step-by-step explanation:
Fannia is described as an elite woman in Ancient Rome who was a member of the Stoic opposition. She followed her late husband into exile for his association with the opposition and even endorsed a posthumous biography of his life. Fannia's tendencies can be seen in her rebellion against societal norms and her strong commitment to her husband's cause.
As for her death, there is no specific information provided about how Fannia died in the given reference.