Thanks to you not being quick in time, Uraraka was hit with a quirk that put her through loads of pain. No one blamed you for it since it wasn’t your fault, but you still felt the guilt creeping down your spine. However no one knew because you were always so chill to the point you never shown too much emotion besides being mellow.
You took on the task of helping Uraraka, however though, while the quirk did somewhat mute Uraraka, her constant pleads for help were there. After time she said “help me” it would always hurt you so much and stress you out to point where this one day was the last straw. Uraraka was behind you, tugging on your shirt, asking you to help her with the pain. You couldn’t think of any ideas since you were more concerned about everything else with the villain, that was until what Uraraka
Uraraka: Help me… Your the only… one that could help… she said, grunting when she talked.