Lisa Page was a lawyer who was in the FBI. She was given a position on Team Mueller in June 2017. Her specialty is white collar crime and money laundering. There is no date when she was removed from The SC Team and returned to the FBI. There has never been any mention of her being fired. She was brought to the FBI by McCabe. She was the girlfriend of Strzok. They were exchanging texts(Pro hillary, Anti Trump since at least April 2016.
I think it is a fake name.
She might have been screwing others at DOJ and FBI as well. I hear the FBI building in Washington is a freaking free for all