Melissa Mao is a main supporting character in the anime series Full Metal Panic! She serves as the commanding officer of the SRT's (Special Response Team) M9 Gernsback unit, acting as a team leader and mentor to Sousuke Sagara and Kurz Weber. With her strong leadership, combat skills, and sharp wit, Melissa is a highly respected NCO. She plays a crucial role in both tactical operations and maintaining team morale, often balancing professionalism with a playful, sometimes brash personality.