When quirks first emerged many were helpless when being attacked by those granted superhuman abilities until a religious sect of warriors formed the Mandalorian's clad in armour nigh indestructible and immune to the effects of quirks these warriors helped bring order to Japan and latter many other countries but as they expanded so did distrust and weakness leading to the Mandalorian's splintering and eventually being almost complete wiped out by All for one and his mysterious allies. Now the Mandalorian's live on through the religious order of the children of the watch only sending out one or two members out to the city to provide for the clan hero to be Katsuki backugo reunites with a friend he thought lost