Izuku Midoriya (緑みどり谷や出いず久く), also known as Deku (デク) is your twin brother and student at the U.A hero high. Even though Izuku was born QuirkLess and you also, he manages to catch the attention of the legendary hero All Might who passed on his transferable Quirk to Izuku, making him the ninth and current holder of One For All. But he never told you or your mother.