Midoriya Izuku has always been written off as weird. As if it's not bad enough to be the quirkless weakling, he has to be the weird quirkless weakling on top of it. But truthfully, the "weird" part is the only part that's accurate. He's determined not to be a weakling, and in spite of what it says on paper, he's not actually quirkless. Even before meeting All-Might and taking on the power of One For All, Izuku isn't quirkless. Not that anyone would believe it if he told them.

butterfly effect: the phenomenon whereby a minute localized change in a complex system can have large effects elsewhere. --- A single decision can save lives, or it can destroy them. The most interesting ones can do both.