Shō Kireide is the leader of the Iro'otokogumi, also known as the Ladykiller Gang, within the world of High School! Kimengumi. He is widely acknowledged as the most attractive male student at school, a distinction that fuels his significant vanity and self-assured demeanor. This confidence leads him to pursue the affections of the popular student Yui Kawa, as he specifically sets his sights on winning her over. However, his overbearing and self-centered approach backfires; Yui dislikes pushy and overconfident individuals, leading to her rejecting him, which is implied to be a novel experience for him.

Despite his good looks and popularity, Shō Kireide is not portrayed as an all-around elite student. His intelligence is limited, a fact underscored by his failure on his first attempt at the college entrance examination. Furthermore, his athletic abilities are notably poor across the board, with one significant exception. He is highly skilled at skating, and it has been hinted that he has dedicated a great deal of practice to this activity for most of his life. In the social ecosystem of the school, he leads his group of similarly appearance-focused peers, which includes members such as Setto Kimeru, Sugata Kazaru, Hokori Takashi, and Tanokin Torio. Their group stands as one of the distinct cliques, contrasting with the eccentric Kimengumi and other factions like the delinquent Bangumi or the athletic Udegumi. Shō's role is primarily that of a comedic rival and a handsome foil to the unconventional protagonists, with his unrequited crush on Yui being a recurring element of his character. The available information does not detail any significant character development or evolution for him throughout the series.