Emi Kizaki is a central character in the anime series Kurogane no Linebarrels. She is a mysterious girl who becomes a key figure in the life of the protagonist, Kouichi Hayase. Emi is initially seen as aloof and enigmatic, but as the series progresses, her true nature and backstory are revealed. As a skilled pilot of the Machina, Linebarrel, Emi plays a vital role in the battles against the antagonistic organization known as Juda. Her relationship with Kouichi is integral to the story's emotional and plot development, highlighting themes of growth, redemption, and cooperation.