The Unknkown Threat To Hero Society

Kira Shigaraki or Karei Shimura was born as the younger sister of the infamous villain Tomura Shigaraki or Tenko Shimura.
But what most people don't know is that Kira is just as bad as her brother. She has been sent to UA school by the one and only All For One to get information from the heros. She is the unknown threat to hero society, the UA traitor...
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