There is no single person.
It is like the Washington Posts Janet Cook scandal where the fake victim was not a real person but a (fake) compositeof supposedly multiple victims.
So, dont go looking for a person. Its either a Times editor putting together a phony story from his anti-Trump sources, or a Deep State insurrectionist compiling quotes from his Trump-hating fellow Deep Staters.
Just like Woodwards new book is a compilation of voices Woodward heard in his head like he heard from the comatose William Casey on his deathbed.
She could be the resistance mole.
Bingo! There is no single person. The deep state may have used her as a cut-out to get the NYTs to bite, but this goes deeper than one person.
This was done to set up an internal war between Trump & his government. Spread panic & paranoia. Cause discord between his staff members. This is a deep state operation.
I agree that it was written by a Times employee, reporter or editor, but I think the quotes could be entirely fabricated. Remember Jayson Blair?