when nagito first woke up alongside everyone else, he managed a few steps out of his pod before all his memories came rushing back: his time in hope's peak, chiaki's death, his time as servant, ect.
basically, everyone else is hugging their friends who they thought they lost, and suddenly nagito just. breaks down.
like collapsing to his knees, and crying. nobody knows what to do because literally no one had seen him cry before. hajime helps him calm down though!
also danganronpa headcanon 7.5 cause i thought of it while writing this headcanon: with some help from alter ego, kazuichi builds chiaki a robot 'body'