Now fourteen years old and leading a mission to recruit two new half-bloods from Westover Hall....

A twelve-year-old girl at Westover Hall who seems to be one of the half-bloods Percy's group came...

One of the younger cadets at Westover Hall attending his first school dance.

One of the military cadets at Westover Hall participating in the dance.

Military cadet at Westover Hall who witnessed the strange events at the dance.

A military cadet at Westover Hall present at the school dance.

Military cadet at Westover Hall who attended the school dance.

A military cadet at Westover Hall attending the school dance.

Vice principal of Westover Hall who seems suspicious. Takes a particular interest in Bianca and...

Still searching for Pan while serving as a protector. Joins the mission to Westover Hall to help...

The headmaster of Westover Hall military academy, responsible for school administration.

Food service workers at Westover Hall who prepared refreshments for the dance.

School maintenance worker who keeps Westover Hall clean and secure.

A monster with a human head, lion body, and scorpion tail that shoots poisonous spikes.

Stern military instructor at Westover Hall who maintains discipline among the cadets.

Mathematics teacher at Westover Hall helping supervise the school dance.

Administrative secretary at Westover Hall who handles school correspondence and records.

Teacher at Westover Hall serving as chaperone for the school dance.

School librarian at Westover Hall who manages the academy's library resources.

A ten-year-old boy at Westover Hall, very close to his older sister Bianca. Seems innocent and...

Medical nurse at Westover Hall who tends to student injuries and health needs.

Now fourteen years old, Percy goes on a mission with Annabeth, Thalia, and Grover to rescue two new...

History teacher at Westover Hall who teaches about military history and strategy.

Former military officer who supervises the dormitories at Westover Hall.

Now alive and fifteen years old, daughter of Zeus with powers over lightning and the sky. Still...

Magical force that obscures supernatural events from mortal perception.

Security guards at Westover Hall who patrol the buildings and grounds during events.

Military school students at the dance, unaware of the supernatural drama unfolding around them.