Kirara Kōzuke is a character who appears exclusively in the anime adaptation of the series, as he is not present in the original manga. Within the story, he holds the position of vice-principal at the Ooedo Torimono Gakuin, the police academy that the main protagonist Tasuke attends.

In terms of personality, Kirara Kōzuke is depicted as a cunning and duplicitous individual. While he is a subordinate and appears loyal to the principal, Daibutsu, he is inherently sly and devious. His primary motivation within the narrative is his antagonistic stance toward the protagonist, as he continually schemes and plots to have Tasuke expelled from the academy. His speech is characterized by a distinctive verbal tic, as he frequently ends his sentences with the phrase zansu.

Regarding his role in the story, Kirara Kōzuke functions as an antagonist figure from within the academy's faculty. His position of authority as vice-principal gives him the power to create official obstacles for Tasuke and his friends, contrasting with the more overt threats they face from street-level criminals. His key relationship is with Principal Daibutsu, whom he serves faithfully, though his personal grudge is directed squarely at the young hero Tasuke. The character's name and certain aspects of his design are a reference to Kira Kōzuke no Suke, the historical figure also known as Kira Yoshinaka, who was the antagonist in the famous tale of the Forty-seven Ronin. The character of Kirara Kōzuke does not appear to undergo significant development or change throughout the series, remaining a consistent scheming presence for the duration of the anime.