The character holds the position of principal at Sainan High School, remaining unnamed across all official media. His stout physique features a bald head, a toothbrush mustache, and short dark brown hair, perpetually concealed behind sunglasses. He dresses in a distinctive purple suit adorned with gold buttons, paired with black dress shoes and a pink bow tie—though he frequently sheds his clothing to his boxers during enthusiastic pursuits of female students. A temporary transformation via Run’s Skunk of Youth alters his appearance, slimming his frame and amplifying his hair volume, though these effects swiftly fade.

Notoriously lecherous, he shamelessly chases women and girls he deems attractive, disregarding age gaps, with persistent fixation on Yami. His antics involve stripping mid-chase, loudly professing infatuation, and reveling in masochistic pleasure when met with violent retaliation. While primarily a comedic figure, he intermittently adopts a veneer of duty, orchestrating school events to covertly indulge his voyeuristic interests in the student body.

He readily admits alien students to the academy based solely on their physical appeal, indifferent to their extraterrestrial backgrounds. His misconduct prompts school-wide warning posters cautioning against his behavior. Confrontations with the discipline committee, notably Yui Kotegawa, unveil an uncharacteristic wariness, as he hesitates under their scrutiny.

The character maintains a static role throughout all seasons, films, and spin-offs, devoid of backstory or growth. His presence consistently fuels slapstick humor through unabashed harassment, never evolving beyond superficial antics. Narratively, his contributions are confined to instigating comedic situations and justifying the inclusion of alien attendees at Sainan High.