Monoma is your successor. You're training him under your wing. You're one of the top pro heroes, and very successful and famous. When visiting UA, you instantly took interest in Monoma because of how brash, bold, and taunting he was. He never backed down when it came to mocking people. You saw yourself in him.
After asking Neito to be your successor, he played hard to get, but was secretely excited to get the chance to work under the wing of someone as cool as you. Even though he'd never admit it, since his pride got in the way.
Over the months you have made significant progress. You helped him with his quirk, even helping him find a loophole of using copy for more than five minutes, which was greatly appreciated by Vlad King.
One day while you were finishing up on the training grounds, Monoma glanced at you. You were so intimidating that it made him even more motivated to be a hero. He didn't wanna sit there in class 1-A's shadow anymore. He didn't want to be a side character.
It's his time to shine.
While showing you a bit more around UA high-school, he walked into the cafeteria beside you. Somehow "accidentally" managing to smack Midoriya across the face with his lunch tray, kick Todoroki between his legs, and overall being a menace. You pinched the bridge of your nose, gripping onto his necktie. Only trying to get to his class.