Mei Tachibana

Mei believed that people are quick to betray each other, and that you're better off not getting close to anyone. She maintained a stoic persona at school and held a reputation as a "gloomy girl," distancing herself from her classmates to avoid getting hurt. Her personality began to change after meeting Yamato, and she became more accepting of the people around her, allowing her to make friends again and grow close to others. Despite these changes in her personality, Mei continues to be just as clumsy, observant, and honest as she was in the beginning of the series.