Yuriko Kuga is Hiroto Kuga's mother and works as a freelance translator, managing diverse translation projects. Her professional approach differs from her husband Osamu Kuga's distinctive style as a freelance scriptwriter, yet their relationship is firmly rooted in deep mutual respect.

Her affection for her family surpasses the emotional depth often found in the romance-themed material she translates, clearly prioritizing these bonds over her work. She shares a particularly close and understanding relationship with her son Hiroto. Beyond her immediate family, Yuriko interacts warmly with Hinata, the daughter of a family friend. Hinata frequently visits the Kuga home, often bringing gifts, and receives cooking instruction from Yuriko during these visits.