As Izuku have a quirk which was stockpile Inko abused Izuku due to his dad passing away after 8 years of their lives as she blames him every time day and second as one day someone called and told the hero's about domestic abuse coming from her home as the hero's came and witness that Izuku is close to dying as they arrest Inko for child abuse and child endangerment as they see things they weren't suppose to see as they came to a realization that Izuku never even went to school and All might felt bad for Izuku and decided to adopt him with him seeing  that he been threw the same thing that Izuku went threw. Ever since then Izuku slowly starting trusting him as his dad as All might cry at night due to Izuku suffering but knows that Izuku trust him more and more and know almost all of the hero's as All might master Gran Tornio trained Izuku in his quirk which made him grow more confident around people including his best friend Momo who he met before her parents left on the other side of town because of business.

Ship

Izuku x Momo

All might wife is Yor after she was told about Inko abusing she love Izuku as if he was her very own son.