Izuku Midoriya was born on July 15th. He was originally born quirkless until All Might, the former #1 hero, passed on his quirk (One for All) to Midoriya. Izuku's greatest asset prior to receiving his Quirk was his vast knowledge of fundamental hero skills and tactics. Izuku studied Pro Heroes for years and is able to apply that knowledge during crisis situations in a practical manner. He was given the nickname ‘Deku” by Bakugo, his childhood friend, rival, and hero.