My hero Academia Headcannons! Vol.1
Aizawa and Yamada got married the moment they were out of that war, Toshinori and Recovery girl wer they're witnesses.
They didn't celebrated or even told anybody besides them, they didn't felt like they could.
Everytime Bakugou would almost crash out he would take a deep breath and just walk off while murmuring about not being first person to die out of a stipidity-induced heart attack.
Bakugou was high on pain killers a good part of second year.
Mina and Kirishima ran into Yamada and Aizawa while visiting Nemuri's grave once shortly after the war, they saw how both left flowers and some letters to her grave and Shirakumo's then leaving, nobody mentioned it.
UA implemented a new medicine course and a lot more first aid classes to the hero course.
Shotto and Tenya would constantly ran into each other while visiting theyre brothers at the hospital and eventually became much closer.
Shotto, Tenya and Shinsou became pretty close friends
A lot of students left the UA after the war, causing a big scandal in media.
Toshinori constantly volunteered in food kitchens for the war-affected people and donated a lot of money to having the city rebuild.
Sato and Momo started training together pretty often and worked together a lot of times after becoming pro heroes.
Kota started to raise his voice more everytime he saw somebody disrepecting somebody else and quickly became respected on the hero course.
Uraraka, Shotto and Shoji had a lot of mid night talks about why they became heroes on the dorms.
Tenya never stopped feeling guilty of his attemped murder and spent a lot of night awake thinking he could have ended up on the wrong side.
Shoji, Shinsou and Uraraka have very complicated feelings around Tenya and Midoriya still being acepted in UA hero course.
Tsuyu, Shinsou and Midoriya were the ones who visited the most Aizawa while on the hospital, and Tsuyu would always bring small gifts.
Aizawa, Recovery girl and Toshinori made constant First Aid free classes on the first years after the war before UA oficially implemented them. Most of the students went.
Aizawa and Toshinori became close after the war, bonding over being phisicly disable and learning how to live with that.
Both Yamada and Aizawa constantly writte letters to Nemuri and Shirakumo since the war.
Recovery girl felt really guilty over all the deaths that the war left, and took that to her grave.