The Guardian Legacy Series by Ednah Walters

Awakened is the prequel to the Guardian Legacy series. Most teens turn sixteen and get the license to drive, but Lil Falcon gets the license to kill demons. Orphaned as a child and raised by an eccentric grandfather, Lil is concerned with surviving high school and is unaware that she's a Guardian-a being with super powers charged with killing demons and protecting humanity. When she meets Bran, a mysterious boy with amazing abilities, his psi energy unlocks her latent powers... moreAwakened is the prequel to the Guardian Legacy series. Most teens turn sixteen and get the license to drive, but Lil Falcon gets the license to kill demons. Orphaned as a child and raised by an eccentric grandfather, Lil is concerned with surviving high school and is unaware that she's a Guardian-a being with super powers charged with killing demons and protecting humanity. When she meets Bran, a mysterious boy with amazing abilities, his psi energy unlocks her latent powers. But Bran has a secret that can ruin their growing relationship, and the truth she discovers may destroy everything she believes in unless she finds the right balance between love and sacrifice. less

Lil isn't just an average teenager. She's one of the Nephilim--the descendants of humans and angels--which gives her some serious psi skills and a mission for redemption. Just when Lil thinks she's found a balance between her normal life with human friends and her training to become a Guardian, she's warned that someone close to her will betray her... moreLil isn't just an average teenager. She's one of the Nephilim--the descendants of humans and angels--which gives her some serious psi skills and a mission for redemption. Just when Lil thinks she's found a balance between her normal life with human friends and her training to become a Guardian, she's warned that someone close to her will betray her. When the boy she loves starts acting strangely and one of her human friends acquires a supernatural ability, Lil begins to realize that someone is manipulating the people she loves... and won't stop until she's been lured to the dark side. less

Bran and Lil may have escaped an attempt to lure Lil to the dark side, and recovered the contracts damned people signed with Bran when he was a soul collector, but someone forgot to tell them that no one switches sides or cancels contracts without consequences. Hunted by an unknown but powerful enemy, Lil, Bran and the Guardians must seek help from unlikely sources to avert total annihilation of the Guardians... moreBran and Lil may have escaped an attempt to lure Lil to the dark side, and recovered the contracts damned people signed with Bran when he was a soul collector, but someone forgot to tell them that no one switches sides or cancels contracts without consequences. Hunted by an unknown but powerful enemy, Lil, Bran and the Guardians must seek help from unlikely sources to avert total annihilation of the Guardians. When they finally face their enemy, one of them may have to make the ultimate sacrifice. less