Traitor or Ally?

This book consists of different stories that are written on the spot. This is a mixture of different kinds of endings of either reader, Kaijin, will be the traitor or ally of the heroes.

Main Character/Original Character: Kaijin, Kai (for short)
Quirk: Underworld, Manipulation
Background: Kaijin was the only child of a family of a bloodline of hero, villain and vigilante. At a young age, Kaijin's mother was given a label of a hero because of her various works and rescue mission that was deemed applaudable to the public. Years later was then drove to death due to the public's opinion. Kaijin's father was working as a hero at the UA High School and had little knowledge of who his child was due to a manipulation of his memory at one point of time.