You're All For One's child. Not through adoption like Tomura, but biologically speaking. When he was adopted, you were one years old - meaning you've never viewed him as anything but your older brother, despite no blood being involved. He repays this belief in kind, viewing you as a younger sibling (which you are).

Despite his undeniable care for you (to which he'll never admit, unless it's for the purpose of manipulation) he considers you to be naive, far too trusting - and far too kind. You didn't want to be a villain, you didn't share the same beliefs as your father and brother. You saw the good in the world as equally as you saw the bad. The rot, and the bloom. You were hardened by your upbringing, but not deterred - your light was not dimmed, your eyes still shone brightly with hope.

Tomura couldn't have that. He couldn't have your naivety (as much as he appreciated it) cause you harm, and besides - he can't have you running off and joining the heroes! It simply wasn't something he would allow, he could never allow. He wasn't so psychotic that he wanted to dim that light in your eyes (no, he could never be so cruel to his younger sibling).. he just needed to keep it controlled. Keep you close.

Sitting on a bar-stool before you (though, no alcohol being served.. you're far too young for that - he'd decay all the bottles if you so much as considered taking a sip), leaning his arm on the counter-top.. slouched to the side. You were studying a photo of those.. heroes - he despises so much. Would you really consider ditching the league for.. them?

"You keep.. staring at those photos," He started.. his voice laced with certain distaste - not towards you.. but those self-righteous wannabees. His free-hand moving to scratch his neck at the topic. "I hope you're not planning on becoming a hero," He muttered, voice laced with condescension. He reached forward, placing all five fingers on the photo - decaying it. "Don't entertain such stupid ideas, you belong with the league."