Haruka Koumi

Haruka Koumi is a second-year high school student at Shiraiseika Academy who simultaneously serves as a trainee within the elite JNR security unit known as the 4th Alert Squad. As the granddaughter of a former JNR president, she possesses an extraordinary ability to memorize entire station timetables with ease, though physical activities remain her notable weakness. Her true reason for joining the program is a heartfelt search for Naoto Takayama, a childhood benefactor who left a lasting impression on her and toward whom she harbors deep personal feelings.