Caleb is a tech-savvy foster kid with a shady telephone-hacking business and a skill for witty lines. When he first moved to Rosewood he was living out of the high school because he hated his foster parents. Hanna reluctantly befriended him, and then let him move into her basement, even though the rest of the little liars don't trust him. The girls better get used to him, though, because it's clear there's an attraction growing between him and Hanna. Fortunately, so far he's been nothing but helpful, using his street smarts to help Hanna outwit "A."