Leila

Laika's older sister. She has a long-standing, tumultuous friendship with Flatorte. She is over 300 years old. In the main story, she reunites with her childhood friend after 80 years and they hit it off, deciding to get married. Her husband works at the village office. She also appears in the spin-off "Red Dragon Girls' Academy." She progresses from a 5th grader to a 6th grader and then graduates. She serves as the student council president before retiring. At home, she is quite sloppy, often staying in her pajamas until just before leaving for school, but at the academy, she is diligent and is highly respected as the "strongest student council president of the academy."

After wandering for about 30 years, she enrolls in the academy. Shortly after enrolling, she is challenged by many upperclassmen, defeats them, and takes many badges. She becomes known as the "Shadow Student Council President" and is actually elected as the student council president during her first year, serving until the 6th grade. Because of this, she was called a "once-in-500-years prodigy." Her initial nickname upon enrollment was "Destruction King," but it gradually changed to "Strongest," and eventually, she was simply called "President."

After passing the student council presidency to Sadie in the 6th grade, she settles things with Laika. After graduation, she embarks on a wandering journey three days before Laika welcomes new students as a 3rd grader. In the main story, it is said that Laika was better at sports and stronger in fights since childhood, but in the spin-off, it is mentioned that she never had a serious fight using force with Laika, and there was no female student stronger than her within the academy.