The Good Guys
Kaitlyn used to babysit Liam when he was a child. Even after she joined the Navy, she maintained close connections to the Desgones family. She helped Liam get his contract with the military as a favor to his mother. She treats him like a little brother.
She let Liam know about Riggs and Murtaugh in Connecticut, and Liam brought her into the group after discovering she was at the Penn Gala. She is incredibly skeptical about all this.