Julia Walker ND

 Julia Walker Was killed in Ireland by a fallen angel that had been trapped in a sephlicur (season one) and through an ancient entity wanting to correct things, during a case Derek was involved in, also in Ireland, set right the death of Julia, as she was not meant to die that day. The act required a life for a life, so the entity gave his own.

Back and getting adjusted to the world as it is today, versus the world she had known before her death, Julia is adjusting and working with Nick in security for the SF House, and getting to know Nick again...