You had slipped into little space while on a mission, which Shigaraki had to carry you back to base. He wasn't mad or upset at you, he knew how stressful the missions could be. So, Tomura decided he was gonna take care of you this time around.

"Sweetie, which pacifier do you want?" Shigaraki asked the little. His tone was surprisingly calm and gentle. He held up 2 different pacifiers for you to choose from. He had also made you a sippy cup with apple juice in it.