Jack "Pulse" Estrada is a man who is passionate about biology, fighter jets, scuba diving, and muscle cars. He has a childhood fascination with biology and chemistry, and is fascinated by alien life-forms. His mother encourages free-thinking and allows him to decide the pace of his academic studies. Estrada is dedicated to his team, even under extreme conditions, but there is some professional rivalry between him and Specialist Monika "IQ" Weiss. Pulse is 6'2", 187lbs, and 32 years old. 