Kojiro Shinomiya has coral-colored hair, usually styled in an undercut on the right, and wears glasses over amber eyes. A silver cross necklace is often visible over his chef's uniform, which he pairs with a red neckerchief. Born in Kyushu, his childhood was marked by frequent fighting, yet his mother always responded with home-cooked meals. A pivotal visit to a French restaurant, witnessing his mother's profound happiness, ignited his dedication to French cuisine and drove him to enroll at Totsuki Culinary Academy. He excelled academically, achieving an "A+" in Italian Cuisine despite it not being his specialty, and rose to the 1st Seat of the Elite Ten Council, with Fuyumi Mizuhara as the 2nd Seat. Upon graduation, he announced his goal to earn the Pluspol Award in France. He departed despite concerns from peers like Hinako Inui, defeating her decisively in an unofficial Shokugeki challenge. In France, he faced early setbacks including lost luggage, restaurant rejections, and job termination due to sabotage. After firing insubordinate staff, he adopted a demanding, ruthless leadership style, insisting on strict adherence to his recipes. This approach revitalized his career and led to winning the Pluspol Award. However, this achievement resulted in creative stagnation, fueled by a fear of having no further goals. Returning as an instructor for the 92nd Generation's Training Camp at Totsuki Resort, he expelled numerous students for minor infractions. For the Nine Vegetable Terrine assignment, he deliberately provided oxidizing cauliflower, leading to Megumi Tadokoro's expulsion for altering his recipe. Soma Yukihira challenged him to an unofficial Shokugeki, arbitrated by Gin Dojima. Shinomiya easily defeated Megumi and Soma with his Chou Farci. Forced by Gin to taste Megumi's Rainbow Terrine, he experienced vivid memories of his mother's warmth. This caused him to rescind Megumi's expulsion and acknowledge his own stagnation, reigniting his passion for cooking. Later, as Soma's supervisor during the Stagiaire at Shino's Tokyo, he maintained strict standards but acknowledged Soma's rapid improvement. He helped refine Soma's dish for a staff competition, ultimately approving it for his menu and encouraging Soma to aim for the Elite Ten's 1st Seat. He also trained Megumi for the Regimental de Cuisine, initially struggling with her trauma from their first encounter. By referencing a motivational speech from one of her favorite manga, he helped her regain confidence and taught her to integrate her vegetable expertise into diverse themes. His culinary philosophy centers on French cuisine with innovative use of "Légumes Oubliés" (forgotten vegetables), particularly Japanese varieties uncommon in French dishes, earning him the moniker "Légumes Magician." After achieving success in France, he opened Shino's Tokyo. His relationships include professional respect for Gin Dojima and a combative yet caring dynamic with Hinako Inui, who supported him emotionally during his France departure. He remains ambivalent toward external conflicts like Azami Nakiri's "Central" regime, prioritizing his restaurant's independence. The spin-off *L'étoile* expands his backstory, detailing his early struggles in France and deepening his bond with Hinako, including their emotional farewell Shokugeki. Post-series, he continues pursuing culinary excellence, targeting three Michelin stars for his restaurant.