Melissa Shield is a third-year student at I-Island Academy and the daughter of Professor David Shield.

Melissa is a kindhearted girl with a positive attitude and vast intelligence. Despite being Quirkless, Melissa works hard and desires to become a hero. She looks up to heroes like All Might, but admires her father the most. Melissa wants to help support heroes as her father does. She believes that by studying hard to create new inventions that she and her father can indirectly fight for peace.