Lily

Lily is Lara's stand-in, so that "Las Serpientes Que Caminan" would think that she and Samantha Nishimura, who also has a stand in - Julie are home, while Lara and Sam themselves go to "supposedly' hunt Chupacabra (in reality - they are searching for Angus "Grim" Grimaldi, but find his lawyer twin brother - Cuddy Grimaldi instead). Lily asks what should they do if they come knocking on their door and Lara replied that they should call Joslin Reyes.

Personality
At first glance Lily seems wild, but she is very nice and is willing to do favors for friends.

Trivia

 * Lily says that Sam is her buddy from acting class, which if the first time we have heard of Sam doing acting on the side. (except for the last chapter where it is strongly implied, but not confirmed)