He tells her that her father was framed and presents her with her father's share of Nol Corp, 49% of the closely held stock, a result of her father's funding the company's start-up.
After realizing that Nolan is telling the truth, she decides to clear her father's name.
After learning that Charlotte is her half-sister, Emily chooses to protect her from her revenge against the Graysons, although she does use her to take Conrad down.
Nolan Ross is a computer genius and Emily's wealthy ally with a cocky attitude and poor social skills.
In season 3, however, it is revealed that Nolan installed a failsafe in the program that led to his arrest, enabling the FBI to (off-screen) shut down the Initiative.