Youhei Sunohara serves as a comedic figure from the *Clannad* franchise within the *Kaginado* crossover series, engaging primarily in humorous interactions and recurring gags throughout both seasons. In Season 1, Sunohara attempts to capitalize on the series title "Kaginado" to position himself as the central character, asserting it grants him precedence. He demands a harem, threatening to shave the dog Potato bald should the female characters refuse. His scheme ends abruptly when Yuiko Kurugaya slashes him with a sword, clarifying that "Kaginado" means "Key, etc." and does not reference him. Sunohara later joins a chaotic soccer match against the Neo Kendo Club; Lucia Konohana's vibration abilities destroy his team's uniforms, leading to their suspension for indecent exposure. References to Sunohara's sibling dynamic with his younger sister Mei recur. During a "best siblings" baseball game, he demonstrates protectiveness towards her, echoing his *Clannad* portrayal. In Season 2, Mei concludes a student council election speech with an offhand joke about "toilet seat covers," prompting Sunohara to demand the culprit who taught her reveal themselves, implying retaliatory intent. A running gag features Sunohara's rivalry with Tomoya Okazaki over perceived harem statuses. At a council meeting of male protagonists, Sunohara disputes Tomoya's self-proclaimed "Harem King" title, sparking a physical altercation. Sunohara's romantic pursuits consistently meet rejection, reinforcing his role as a comedic foil. Sunohara occasionally exhibits situational awareness, such as recognizing the absurdity of a chibi-fied cat (Dorj) singing *AIR*'s theme song during a festival. His character remains unchanged by the series' conclusion, persisting as a source of slapstick humor and light-hearted conflict.