Headcanons you have, that you think nobody else has?
Kaminari is the result of a failed Quirk Marriage.
His half-siblings are Yuyu Haya, [Elecplant](Elecplant), and the student from Masegaki Primary School with ElectroMagnetic Bullets
All are related by his father, who aspires for a child that can simultaneously absorb/store/generate/discharge with no negative side effects