According to the character's official description,
Trapped in Hell for thousands of years by God (her ex-husband), the Mother of Angels is now free on Earth. Once reunited with Lucifer, it will become clear that she's the one he takes after. Mom is fearless and has a strong conviction for who she is and what she deserves. However, mother and son do not share the same opinion when it comes to humanity. Everything that fascinates Lucifer about people repels Mom -- a disdain that's highlighted by that fact that Mom's trapped in a human body for her stay on Earth. Lucifer's desperate to find out what Mom's up to, but she claims that all she wants is to spend time with her sons again. But can the devil's mom really be that innocent?
Executive producer Joe Henderson explained the difference between the show's first and second seasons, saying, "[Season 1] was the story of a wayward son dealing with his father issues, Season 2 is Mom."
Helfer is no stranger to the geek scene. In addition to "Battlestar Galactica," her past credits include "Powers," "Con Man," "Mass Effect 2" and more.