Michelle Lee (or Michy to her adopted sister, Amanda) was an NCIS Special Agent and legal assistant who for a time also served as a temporary of the main NCIS Major Case Response Team.
However, she was later revealed to be a mole leaking highly sensitive and also classified information to an unknown source.
Tragically, her life and career came to an end in November 2008 when she sacrificed herself to stop her handler from escaping with the two dying at the hands of NCIS Special Agent Leroy Jethro Gibbs.
Much of Lee's past is unknown but at some point, she was born into a family, presumably of Asian descent and later grew up alongside an adopted younger sister named Amanda.
When their parents died, Lee took on the case of raising Amanda by herself.
At some point, Lee began working at an unknown Harvard Law School, eventually crossing paths with NCIS Director Jennifer Shepard who was presumably impressed with Lee's work and sensing a bright future for Lee, gave Lee the opportunity to join which Lee accepted.
Lee later presumably graduated or quit for Harvard Law altogether.
After that, she joined NCIS and upon becoming an official NCIS Special Agent, was assigned to the agency's legal department where she presumably worked on getting search authorizations for various NCIS teams.
NCIS Season 4
NCIS Season 5
NCIS Season 6
Lee was a young woman in her late twenties, early thirties and of Asian descent with long brown hair that hung down past her shoulders and brown eyes.
She wore various pant suits, high-heeled shoes and blouses as well as jackets over blouses.
As an NCIS Special Agent, Lee was trained to use firearms.