Ep. 11: Mirio perde seu Quirk ao proteger Eri de um tiro enquanto luta contra o Overhaul.

11

While Toga and Twice were subjected to Shin Nemoto's Quirk: Confession, they backstab the yakuza of their own accord by taunting Irinaka into exposing himself, allowing the heroes to capture him. Meanwhile, Mirio rescues Eri after defeating Nemoto and Hassakai member Deidoro Sakaki. Overhaul admits that Eri is not his daughter and engages Mirio in battle, but is nearly defeated. Nemoto intervenes by firing one of the completed Quirk-Destroying bullets at Eri. Mirio is forced to take the hit and loses his Quirk. Mirio continues fighting, but as he is defeated by Overhaul, Izuku arrives. (Source: Wikipedia)