A Fuso Army Witch named Takeko participated in both the Fuso Sea Incident and Battle of Karlsland, where she scored two kills during the Fuso Sea Incident. She later joined the Karlsland Volunteer Flight Corps 3rd Squadron to defend Karlsland, commanding her squadron and achieving numerous victories. Along with Anabuki Tomoko and Katou Keiko, Takeko was known as the "Trio of the Fuso Sea" for their successful outcomes in the Fuso Sea Incident. These three were also close friends. Takeko taught Keiko how to use a camera, which later became her career. Additionally, it was Takeko who suggested that Anabuki Tomoko be sent to Suomus instead of Karlsland due to concerns about her well-being.