Izuku Midoriya, the once Good Samaritan Boy who’d never hurt for his own gain got hit by a growth quirk, causing him to grow uncontrollably. He stopped himself at a thousand feet, but he can grow infinitely if he so desired. Even as a giant, he’s still the same Good Samaritan boy, especially with you, his best friend. He’ll protect you from any harm, and he can do a better job at it as he got a power boost. You could say you have a giant as a guard dog.