Here are the main characters in the first book, "Virals":
* Tory Brennan: The protagonist, a 15-year-old girl living in North Carolina with her family. She's a talented runner with a strong sense of justice.
* Landon "Landy" Hayes: A 16-year-old boy who is Tory's best friend and a skilled climber. He's compassionate and loyal.
* Hiram "H" Gage: A 15-year-old boy who is an avid gamer and computer whiz. He's often sarcastic and a bit cynical.
* Hope "Hoppy" Jensen: A 14-year-old girl who is fiercely independent and athletic. She has a tendency to be stubborn and impulsive.
* Jack "Jake" Reilly: A 17-year-old boy who is the oldest of the group. He's charming, charismatic, and somewhat mysterious. He's also a skilled musician.
* Dr. Hilary "Hal" Brennan: Tory's father, a forensic anthropologist, who develops the experimental virus that gives the teens enhanced senses.
Other characters:
* Dr. Marcus Brennan: Tory's uncle and Hal's brother, a geneticist who works with Hal on the Virals project.
* Mrs. Brennan: Tory's mother, a veterinarian who is fiercely protective of her family.
* Detective Michael "Mick" Reilly: Jake's father, a police detective who is initially suspicious of the Virals project.
* Mr. Jensen: Hoppy's father, a former military officer who is skeptical of the Virals program.
The series continues with further adventures, and new characters are introduced in later books.