Kaoru Hanazono is a secondary character from the agricultural anime series No-Rin. He is a student at Tamo Agricultural High School, serving as the class representative of class 2-E. He holds a prestigious position within the school as one of the "Four Heavenly Farmers," a title given to the most skilled students, and his specific expertise is in landscaping and garden design. His family background is in the construction and landscaping business, operating a company called Hanazono Gumi, of which he is the heir and president. This connection to the industry explains his refined skill set, which includes the ability to create advanced rooftop gardens and traditional Japanese tea ceremony rooms.

Kaoru has a very distinctive and flamboyant appearance that makes him stand out. He has shoulder-length pink hair with a single stray strand that falls across his forehead, and blue eyes. He is noted to have a black beauty mark, or mole, located under his left eye, and is considered by his peers to be the most handsome and hottest guy at school. His fashion sense reflects his princely and confident demeanor; he wears a long, prince-like school uniform and often leaves his white shirt unbuttoned at the chest, a style that further accentuates his bishounen, or beautiful boy, aesthetic. He is frequently seen carrying a rose in his pocket, which has earned him the nickname "Rose Hanazono".

Behind his charming and charismatic exterior lies a complex personality. He is portrayed as flamboyant, confident, and very aware of his own attractiveness. However, his most defining trait is that he is genuinely homosexual, a fact that is subtly hinted at by his nickname, as the rose is a flower symbol often used in Japan similarly to how the lily represents lesbianism. Kaoru's primary motivation throughout the story is his deep, unrequited romantic attraction to the male protagonist, Kosaku Hata. He confesses to having fallen in love with Kosaku at first sight during the school's entrance ceremony. To get closer to Kosaku, Kaoru employs elaborate schemes, such as pretending to flirt with other female characters like Minori Nakazawa and Ringo Kinoshita. His interactions with Ringo are specifically a ruse to lure Kosaku into a situation where he can make a move on him directly. In one notable instance, he successfully kisses Kosaku by taking advantage of Kosaku's obliviousness to his romantic intentions. His realization of his own sexuality is given a comedic origin story, awakening to his identity after seeing Michelangelo's statue of David in a history textbook.

In the narrative of No-Rin, Kaoru serves as both comedic relief and a rival figure. His open and persistent pursuit of Kosaku puts him in direct conflict with the other characters who are interested in the protagonist, particularly the female leads. Despite his predatory and scheming tactics, he is a capable and respected student. His key relationships are defined by this pursuit. He shares a notable rivalry with Kei Kamatori, who seems aware of Kaoru's true nature and attempts to warn Kosaku about his advances, often arriving too late to prevent an incident from occurring. Throughout the series, Kaoru exhibits notable abilities beyond his academic knowledge of landscaping. He has a sharp intuition, managing to instinctively determine the true gender of the idol Riku Murakumo when others could not. While much of his character is played for erotic and comedic gags, sharing the spotlight with the teacher Becky, he does show moments of sincerity that add depth to his role as a character genuinely struggling with and acting upon his feelings.