Mia

Mia was a teenage mortal girl and the biological mother of Henry Mitchell Jr. At some point in her life she became romantically involved with Christopher Mercer, a powerful crime lord, to the point where the two fell in love and planned to run away together. She then became pregnant with his child, but died before she could carry the child to term.

Background
Mia was a direct descendant of James Bowen sister of Polianna Bowen. Back in the 1800s, James Bowen's daughter, Emma ran away from an arranged marriage. She found love eventually and had many children and her children had children and so on. Her great-great-granddaughter Georgina Bowen got romantically involved with the a Darklighter, Anthony. She was unaware of his species and when she found out who he actually was, she ran away from him with a child in his womb to another state. Months after, Mia was born. Fearing that her daughter would have Darklighter's powers, Georgina bound her powers and so Mia never displayed magic.

Meeting Christopher and Birth of her Child
When Mia was a young teenage girl, she fell in with a bad crowd and eventually met the Mercer's - a powerful crime family. She became romantically involved with Christopher Mercer, the son of a notorious crime lord, sometime before her death. Her involvement with him would eventually lead to her becoming pregnant with their child.

Death
Late at night, near the end of her pregnancy, Mia ran away from Christopher and the Mercer family after realizing that the situation the couple were in wasn't fit to raise a child. She was in an alley when she witnessed a magical battle between the Darklighter, Rennek and Paige Matthews. She was hit by a straw arrow, and died shortly after. However, Paige was able to save her unborn child by orbing the child from her womb. She then took the newborn child home with her, which lead to Paige and her husband, Henry, adopting the child and naming him Henry Mitchell Junior.

Personality
Based on what Christopher has said about Mia, she was a good person with a great heart. She loved helping people and would do anything to do so. She loved recklessly, but she was also very smart. She was able to recognize that staying with Christopher and the Mercer's was dangerous situation for both her and the baby, which presumably lead to her running away.