Principal Kokedaruma heads Arama Academy, where Mai Machiko teaches. He consistently exhibits leniency towards student misconduct, especially the boys' pranks directed at Machiko-sensei. This permissiveness includes turning a blind eye to or tacitly condoning actions like skirt-lifting and peeping, often siding with the involved male students.

Professionally, he prioritizes elevating the school's academic standing, explicitly tasking Machiko with preparing students for Tokyo University admission to establish Arama Academy as prestigious. Despite this academic focus, his own conduct includes personal impropriety, such as participating in peeping activities mirroring the students' behavior.

The character's traits remain consistent across the original anime series and multiple live-action film adaptations. His documented role functions primarily to enable or overlook the comedic situations involving Machiko and her students, without substantive personal growth or explored background.