Alexandra Gataki is the younger sister of Cassandra, attending university in Olympus. Known for her sunny disposition and perceptive nature, she is fiercely loved and protected by her sister. Troubled by the increasing dangers and power plays in Olympus, especially after the violent events involving the Thirteen, Alexandra worries deeply for Cassandra. She challenges Cassandra's self-sacrificing tendencies and complicated relationship with Apollo, believing they have a life worth fighting for in the city they both call home.