Excel's junior officer, with a penchant for dying and reviving in quick succession.

She is noticeably Ilpalazzo's favorite officer, usually receiving lighter punishment and higher promotions than Excel. Hyatt is a rather innocent, naive and sensible woman, often serving as the agent that thinks things through more as opposed to Excel who seems to act on impulse.

Although she is rather oblivious to IlPalazzo's mild romantic interest in her, she is well aware of the more rampant romantic intent of their neighbour, Watanabe, who knows her by her alias of "Miss Ayasugi".