Elizabeth Butler, often called Beth, is a supporting character in the anime. She works as a combat operator in the defense forces stationed at the UN Kurobe Laboratory control room. In this role, she serves as part of the support team responsible for monitoring and coordinating responses to the supernatural and mecha-based threats encountered by the main protagonists.

Physically, Beth is portrayed as a young adult woman with blue eyes and blonde hair that reaches chest-length. She is frequently seen wearing her uniform as part of her duties at the research facility.

The character is defined by a warm and compassionate personality. Descriptions consistently emphasize that she has a big heart and is a caring individual. This caring nature likely influences her professional conduct, making her a dependable and considerate presence within the high-stress environment of the operations room. She also seems to value her social connections at the facility, as she is identified as a good friend of another operator, Rita Ferreira Mendes.

While specific details of her personal motivations or a significant character arc are not detailed in the source material, her role is firmly established as part of the logistical and tactical backbone for the pilots and researchers. She contributes to the story by providing a consistent link to the organized human response against the unfolding conflicts. Her notable abilities are not tied to combat or piloting but rather to her professional competence as an operator in a high-tech military command center.