Yuriko Hori is Kyousuke Hori's wife and mother to Kyouko and Souta Hori. She possesses long brown hair and olive eyes, typically seen with her eyes gently closed and a calm expression. Her appearance closely mirrors her daughter Kyouko, reminiscent of her own high school days when she wore her hair in a low ponytail or down with bangs.

She exhibits a gentle, caring, and kind personality, though she frequently directs sharp sarcasm towards her husband Kyousuke, often ignoring him or making critical remarks—a stark contrast to her warmth with others. A protective nature underlies her calm exterior, revealed when she slapped a younger student harassing her in high school, demonstrating a serious, thorny side. Kyousuke observed this blend of gentleness and strength.

Her demanding work limits time at home, leading Kyouko to manage household duties and Souta's care. When present, Yuriko prioritizes family. She shows laziness in the kitchen, relying on Kyouko for cooking, though curry remains her noted specialty. Despite her limited availability, she deeply cares for her children and maintains a trusting relationship with them.

Yuriko formed an immediate, strong bond with Izumi Miyamura, treating him like a son and often prioritizing him over Kyousuke. She shows visible excitement during Miyamura's visits, setting a place for him at meals while excluding her husband. This preferential treatment sometimes causes mild jealousy in both Kyouko and Kyousuke. Her affectionate behavior towards Miyamura remains consistent.

Her background includes attending the same high school as Kyousuke, where she was his senior and served on the student council. Her maiden name was Koyanagi, and she knew Takeru Sengoku from those years. She and Kyousuke experienced a temporary separation during their relationship. Yuriko is 38 years old.