Lock and Key (novel)
After her drug and alcohol addicted mother abandons her, child services forces 17-year-old Ruby Cooper to move in with her sister, Cora, who had left for college when Ruby was young. Ruby is upset about this arrangement and continues to wear the key to her old home on a chain around her neck. After learning she will be transferring to a new high school, Ruby attempts to run away but is found out. Nate Cross, Jamie and Cora's next-door neighbor, covers for her. Over the span of the story, Ruby slowly becomes closer to Nate.
List of RWBY characters
At the start of the series, Ruby's skills and resolve when Torchwick robbed a Dust shop robbery impresses Professor Ozpin enough to enroll her into Beacon Academy two years early. Despite her social awkwardness, obsession with weapons, and dependence on her sister, Ruby becomes friends with her classmates while exhibiting the skills and qualities that placed her as the leader of Team RWBY. Following the Fall of Beacon, Ruby learns from Qrow that she and her mother are descendants of powerful silver-eyed warriors whom the Grimm feared since ancient times.