Board Thread:Site Discussion/@comment-30940727-20170806154038/@comment-27406168-20170918062729

It is hypothetical. Quriks can mutate into new forms if they are somehow compatible. This brings up the question of how the genes select and decide what is, and what is not compatible. Unfortunately, I don't have the answer to that...

One for All is... or was two Quriks combined into one. The ability to Stockpile Power, and the ability to Pass on Quirk. There's also Shouto Todoroki's Quirk, Half-Cold Half Hot, which is a combination of his mother's ice manipulation power and Endeavor's Hell Flame Quirk.

You also have to take into consideration what constitutes as "Power". Physical strength is obvious. Mental strength such as intelligence? Most likely not.

Personally, I'd say no to One For All accumulating non-strength related Quriks, and even going further to say that those who pass on One For All would allow the previous user to keep their Qurik as they are passing on One For All, not One For All plus extra quirk.

Who's to say that the previous wielders didn't have Enhanced Strength as a Quirk before adding in One for All?