Mireia is a researcher who becomes fascinated by Tadano's method of standing still to deter monsters. She declares herself his disciple and attempts to codify an 'inaction pressure style.' She organizes training sessions and writes theories, but a monster attack proves her approach insufficient. She learns from the experience and continues her research with more humility. She is intellectual, persistent, and brings a systematic mindset to Tadano's practical caution. She becomes his second main companion after Hilda.