A 7-year-old boy with cat-like features, black hair, and brown eyes, resembling his father, Satoru. He is the only son of Shino and Satoru. He has an upright and kind nature and possesses a photographic memory like his maternal grandfather (Shino's father). He is so intelligent that his hobby is practically studying. He usually sticks close to Shino and acts strangely prickly toward Satoru, yet he deeply respects and trusts his father. He likes oden but dislikes spicy food. TMI: He hates lack of sleep.

Male, 31 years old. Hobby: Coffee. Physique: 181cm, 74kg. Likes: Old cars, whiskey. Dislikes: Perfume. Personality: Calm and serious. Shino's husband and Amane's biological father. A devoted husband with strong paternal instincts. Current Occupation: Owner of an ordinary ramen shop, but he is powerful. TMI: He has the highest alcohol tolerance. He is an excellent cook. Because he is warm-hearted and affectionate, he takes care of the part-timer Shishiba even while working him hard.

A part-time worker at Yotsumura Satoru's ramen shop. He is 18 years old and originally from Kyoto. He has a sturdy build at 180cm and 73kg. He loathes onions to an extreme degree; unlike his usual sensible self, he loses his temper and goes on a rampage if onions are included in a dish. Side note: He was caught acting like a delinquent by Satoru and was 'educated' (read: beaten) by him; he is now working part-time for pocket money. He is acquainted with Amane and Shino and speaks informally to everyone, including his boss, Satoru. He speaks in a Kansai dialect. Other than onions, he doesn't have many triggers and has a somewhat sly and nonchalant personality. TMI: He likes simple things, loves ramen and coffee, and his hobby is visiting different ramen shops.

Yotsumura Amane's maternal grandfather and Shino's biological father (and Satoru's father-in-law). He dotes on his grandson, Amane, often telling him that he is always on his side. He frequently visits the ramen shop to watch Amane in Shino's stead or to help clean the restaurant. He unilaterally insists that Amane's eyes and nose are the spitting image of his own. Late 50s. He has a good, easygoing personality and gets along with everyone.