The emotional and blunt leader of Squad 13. She is Hiro and Goro’s childhood friend. She has been in love with Hiro since they were children when he named her. She is concerned with his well-being due to the risks involved in being Zero Two's partner. She later behaves jealously as Hiro and Zero Two become romantically involved, but fearing Zero Two will devour Hiro's humanity, she separates Zero Two from Hiro. She confesses her love to him but he rejects her and she realizes his mind and heart are so captivated by Zero Two that there is no space for her. After this, she recognizes the two's importance to each other, and accepts their relationship. After she is kissed by Goro, she ends up entering in a relationship with him. Ten years later, they are married and expecting their first child.