Bound To Ruin (Shigaraki x OC)

The feared Tomura Shigaraki is captured and held within the walls of a high-security research facility. There, Rina Hayashi, a brilliant and controversial Quirk specialist, is tasked with a groundbreaking project aimed at suppressing villain Quirks for rehabilitation. Known for her unwavering focus and ambition, Rina begins her research on Shigaraki's powerful Decay Quirk, which she can control in his presence thanks to her own unique abilities. Despite their opposing backgrounds, an unexpected connection forms as Rina and Shigaraki challenge each other's beliefs about society, power, and what it means to be free. Tension escalates as both the scientist and the villain wrestle with their motivations, and Rina must ultimately decide if she's willing to risk everything for a path she never expected to follow.

I do not own MHA characters.