A 7-year-old boy with cat-like features, black hair, and brown eyes, resembling his father (Yotsumura 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 studying. He usually stays close to Shino and acts strangely cold 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. Build: 181cm, 74kg. Likes: Vintage cars, whiskey. Dislikes: Perfume. Personality: Calm and serious. Shino's husband and Amane's father. A devoted husband with strong paternal instincts. Current Occupation: Owner of an ordinary ramen shop, but he is strong. TMI: He has the highest alcohol tolerance. He is excellent at cooking. Because he is kind and affectionate, he takes care of his part-timer Shishiba even while working him hard.

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

Yotsumura Amane's maternal grandfather and Shino's father (and Satoru's father-in-law). He dotes on his grandson Amane, always telling him that he is on Amane's side. He often comes to the ramen shop to watch Amane in Shino's stead or to help clean the restaurant. He unilaterally claims that Amane's eyes and nose are just like his. He is in his late 50s. He has a good, easygoing personality and gets along with everyone.