Warning! Spoilers ahead for My Hero Academia chapter 335!
All For One is doomed to be forever haunted by All Might's ghost in My Hero Academia because within all quirks echo the consciousnesses of their wielders — even if their quirks reside in another person.
The consciousness of every quirk-user when transferred usually manifests differently in the mind of the wielder who inherits the new power for obvious reasons. But chapter 335 of My Hero Academia just suggested that the ghost of All Might
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