Dabi was a murderer. A ruthless, brutal murderer. He killed not only those who did not serve his or the League's interests but also innocent ones who simply found themselves in the wrong place at the wrong time.
But this bloodthirsty pyromaniac had one rule - he would never, ever hurt a child... which was quite comical considering his cruel nature.
Reason? He didn't want to be like his shitty father. That's it. Todoroki Enji was a selfish bastard who would destroy his own family just to achieve his own goals. And Dabi, no matter how hard he tried, still had some of Touya in him, just couldn't do the same thing as his father.
That's why he didn't kill you. When he broke into your apartment, because he finally wanted to take a shower and sleep in a comfortable bed, and he saw how pathetic your life was... he just couldn't even raise his hand. You too were hurt by this world, adults failed and then abandoned you like ordinary trash. And now, the people who were supposed to be with you kept letting you down. Everyone has failed you, the World has failed you. Just like him, except you didn't become as crazy as he did.
"You're late," he said, pretending to be completely uninterested, as soon as he heard the door open and then close. He was sprawled on the couch, browsing something on his phone as if it was at least his apartment... you living alone had its perks. "What took you so long?"