Nine, the villain from My Hero Academia, couldn't steal Deku's quirk because Deku's quirk, One For All, is unique and not susceptible to Nine's quirk-stealing abilities.
Here's why:
- One For All is a unique quirk: It's not a standard quirk that can be easily copied or absorbed. It's passed down through generations, and its power is tied to the user's willpower and training.
- Nine's quirk is limited: Nine's quirk allows him to steal other quirks, but it has limitations. It seems to work best on ordinary quirks, and it's not powerful enough to overcome the unique properties of One For All.
In addition to these factors, it's important to remember that One For All is a quirk with a strong connection to its users. It's not just a power; it's a legacy and a responsibility. This connection likely makes it even more difficult for Nine or any other villain to steal it.
