Zo

Zo is a former Royal Guard of Emberfall and Harper's closest friend.

Early Life
Zo lived in Silvermoon Harbor with her family. Zo always enjoyed playing music and was very talented at it, she was apprenticed to the Master of Song, but it was not what she wanted to do with her life. When Ironfall began recruiting guards Zo left her apprenticeship behind to apply.

A Curse So Dark And Lonely
Zo was formerly an apprentice to the Master of Song but Rhen began recruiting new guards she left her apprenticeship to pursue a career as a guard. Though her swordplay was not the strongest she was very talented with a bow and was fiercely loyal because of this Grey decided to hire her. She is the only female to be selected to serve in the Royal Guard. Zo became fast friends with Harper.

A Heart So Fierce And Broken
Zo assists Harper in letting Grey go, knowing she will do it with or without her. For this Rhen relieves her of her duty, but allows her to remain in the castle for Harper's sake.

A Vow So Bold And Deadly
Zo continues to guard Harper despite not being a guard anymore, she also practices swordplay with Harper. Her helping Grey has caused her to become greatly disliked by the other guards who view her as a traitor and resent her still sleeping in the barracks with the guards.

After a conversation with Rhen, where they discuss Haper and Zo assisting Harper in helping Grey, Rhen offers her the position of Harper's Personal Guard. Zo accepts. Rhen also offers her a room next to Harper so that Zo can better protect Harper and also so she can escape the other guards harassing her.

When Lilith attacks Ironrose Castle Zo immediately grabs a horse, the horse is Ironwill. Harper rides in front and Zo sits behind her. As they flee the castle a winged creature attacks them and rips Zo off the horse's back. Instead of killing her the scraver, Nakiis, instead protects her, presenting an animal's heart to Lilith as Zo's. Zo helps people escape the castle.

Personality
Zo is very loyal and determined. She has a moral compass and disagreed with what Rhen did to Grey.

Harper
Zo is best friends with Harper, they would often stay long into the night talking. Zo is Harper's personal guard very loyal to her. She would do anything to protect her, including risking her job as a guard to help Harper release Grey. Zo risked her life to help Harper escape Lilith.

Rhen
Rhen had his doubts about letting Zo try out, but Zo proved him wrong and became a member of the Royal Guard. Zo originally pledged loyalty to Rhen, and while she did not break her vow, she showed that she was more loyal to Harper than Rhen. Rhen relieved her of her duties because of this as he needed someone who was completely loyal to him. Zo disagreed with what was done to Grey and Tycho thinking it a horrible thing to have done to his former captain of the guards. Zo and Rhen have their differences but they both share Harper's best interests at heart. For this reason, Rhen gave her the position of Harper's personal guard.

Grey
Grey had faith Zo and let her try out to be a guard. He gave her the position. Zo greatly respects Grey, and assisted Harper in setting him and Tycho free after Rhen tortured them for information.