Minko Tsurugi arrives at Kissuiso inn as a live-in apprentice sous chef, training directly under head chef Tomoe Wajima. Hailing from Hokkaido, where her family runs a small local restaurant, Minko's passion for cooking was significantly shaped by her skilled grandmother. Driven by a fierce ambition to develop her skills independently and ultimately surpass her grandmother, she chose to leave home for Kissuiso. This ambition fuels her intense focus and serious demeanor upon arrival.

Minko possesses a reserved, blunt, and often abrasive personality, particularly directed at Ohana Matsumae when Ohana first arrives. Deep-seated insecurity and a fiercely competitive nature underpin this behavior. Minko perceives Ohana's sudden presence and assignment to the kitchen, despite Ohana's lack of culinary skills or apparent dedication, as a direct threat to her own hard-earned position and dreams. She reacts with consistent hostility, criticism, and attempts to undermine Ohana, viewing her as an obstacle.

Her dedication to cooking is absolute. Minko spends extensive personal time practicing knife skills, studying recipes, and honing her craft, often working late into the night. She possesses considerable natural talent and technical skill, earning Chef Tomoe's respect, though her rigid approach and difficulty accepting feedback are noted shortcomings. Minko struggles significantly with interpersonal communication, finding it challenging to express positive feelings or cooperate easily, frequently masking vulnerability with gruffness or anger.

Minko's development centers on overcoming her insecurities and learning collaboration. Events surrounding the preparation for a large wedding banquet at Kissuiso become pivotal. Faced with overwhelming pressure and potential failure, Minko is forced into reluctant collaboration with Ohana. This experience, coupled with observing Ohana's persistence and different strengths, begins to erode Minko's defensive barriers. She starts recognizing Ohana not solely as a rival but as a fellow worker facing challenges.

A significant visit home to Hokkaido provides crucial insight. Confrontations with her family, particularly her grandmother and mother, reveal the complex motivations behind her departure and the immense pressure she feels to succeed. Witnessing the genuine pride her grandmother holds for her chosen path, even if unspoken, helps alleviate some internal pressure, allowing Minko to partially reconcile her drive with her familial bonds.

Throughout her time at Kissuiso, Minko gradually softens. While retaining her serious work ethic and often blunt communication style, she develops a begrudging respect and eventually a genuine, if occasionally prickly, friendship with Ohana and Nako Oshimizu. She learns to accept help, offer assistance more readily, and express concern for others in her own way. Her rivalry with Ohana evolves into a more supportive dynamic that pushes both to improve.

Minko also forms a strong, albeit initially unspoken, romantic attachment to Kouichi Tanemura, Kissuiso's clerk. Her feelings manifest as extreme shyness and awkwardness around him, contrasting sharply with her usual demeanor. She struggles to confess her feelings directly, often relying on actions like preparing specific meals for him. While her affection remains largely unreciprocated romantically by Kou, navigating these emotions contributes to her broader emotional growth and understanding of vulnerability.

Following the closure of Kissuiso, Minko's path diverges. She secures an apprenticeship at a prestigious French restaurant in Tokyo. This move represents the next step in her culinary journey, applying the skills and resilience honed at Kissuiso towards her ultimate goal of becoming a top chef. Her departure is marked by a matured determination and the enduring bonds forged during her time at the inn.