Millie Myers is a supporting character in the series and one of Yor Forger's coworkers at Berlint City Hall. She works as a civil servant in the same office as Yor, Camilla, and Sharon, forming part of a trio that often appears in workplace scenes. Millie is a young woman with light skin and downturned eyes with long eyelashes. Her chin-length hair is styled into a bob that curls inward, in a shade of brown or orange. She has a lighthearted and mischievous personality. She is frequently seen smiling or giggling and enjoys teasing her coworkers. For example, she once jokingly suggested putting snot in the section chief's coffee. She tends to gossip and can sometimes come across as insensitive, but she remains cheerful even after personal setbacks such as breaking up with her boyfriend. She has shown an interest in meeting Yor's younger brother, Yuri. Her motivations are not deeply explored, but she appears to enjoy a simple, social work life and is curious about the personal lives of those around her. Her primary role in the story is to provide a contrast to Yor's secret life as an assassin. Through her casual conversations and questions about marriage and relationships, she indirectly pressures Yor into considering a more normal life, which contributes to Yor's decision to enter a fake marriage with Loid. She has no remarkable physical or combat abilities; she is an ordinary civilian. Her key relationships are with her coworkers, especially Yor, Camilla, and Sharon. She has no direct interaction with Anya or Loid in most of the story, though she once spied on Yor and Loid from a distance out of curiosity. In a later chapter, Mission 91, her character gains some depth when she briefly expresses feelings about her own family and father, hinting at a more complex personal background. Overall, Millie is a minor character who enriches the workplace setting and serves as a catalyst for Yor's domestic story.