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.
Ruby Summers
Ruby has been living in the ruins of Atlantic City with her father, Scott Summers for decades. When Layla Miller and a man named Dwayne show up one day looking for the now aged Cyclops. Ruby attacks them and after finding out who Layla Miller is, brings her to her father, who has been waiting to see Layla for decades. After a conversation with Cyclops, Layla convinces Ruby to meet up with a new mutant named Linqon. Together they start the Summers Rebellion.