Webin demon slayer, sanemi's animosity towards his younger brother genya stems from a traumatic demon attack on their family that left them as the only survivors.
Webthe shinazugawa brothers, genya and sanemi, share a tragic backstory of family abuse and loss, leading to a rift between them.
Sanemi becomes a demon slayer, while genya.
Webgenya has a rather sad backstory which caused a major rift between him and his brother, sanemi shinazugawa.
The latter was forced to kill his own mother who.
Weball members of the shinazugawa family in the kimetsu no yaiba series.