#yoichi has several heart attacks caused by Izuku doing reckless stuff

[drowningin666fandoms]

BNHA Fanfic idea that won't leave me alone:

All for one is Midoriya Hizashi, but...

Nobody knows. Like, literally, nobody knows. Inko never figured out his identity, and with him getting busier after Izuku's fifth birthday it looks like he left bc he's quirkless, so she never much cared for trying to find him and neither did Izuku. All pictures of him are banished into a box in her closet and haven't seen the light of day since Izuku was six or so, when they had a fight over the telephone over him wanting to fix Izuku.

AFO himself suffered obviously a lot of head trauma when fighting All Might, and this gave him partial amnesia. He has no or only very few memories of the decade or so prior to the battle, so he has none regarding his family that he meticulously kept from everyone else's awareness, including the Doctor's. He does see the monthly payment to Inko but assumes it's from a bribe or keeping a corrupt official in his pocket. Given that he can't recall whom it's to and immortality made him extremely wealthy, he doesn't cut it off, nor tries to follow it and make the memory loss obvious.

The only one who does know?

The ghost of Yoichi, who suddenly had another person he could haunt and went to see what's going on. Maybe throw in Nana too, if you want Inko to secretly be a Shimura.

Cue Yoichi fretting over his baby nephew the very moment Izuku gets OFA, up to and including giving him in-depth instructions on how to use the quirk and helping him manage it without harm to him while the other vestiges (minus Nana) are busy laughing their asses off.