Todoroki gets turned into a kid by a villain and he doesn't let anyone get near him. Besides a green haired boy who he felt very attached with. As aizawa was explaining the quirk it made more since why todoroki was so attached to izuku.. "He will be attached to the most, who ever he had the strongest feelings for." The teacher stated, but what feelings? Romantic ones? Or is Izuku just becoming delusional over his love for his best friend? (Btw todoroki isn't gonna be a child like toddler, but he'll be in middle school. Just to spice it up. And he'll keep getting older and older until he's back to his current age)