Kaoru Gojo is a respected and experienced hina doll artisan, specializing in the creation of handcrafted dolls used in traditional Japanese celebrations such as Hinamatsuri (Doll’s Day). After the passing of his son and daughter-in-law, Kaoru took Wakana in and raised him at his workshop and home, exposing him to the delicate artistry and traditions of the doll-making world.

Kaoru taught Wakana not only the technical aspects of the craft such as painting doll faces and sewing traditional clothing but also the emotional significance and cultural weight behind each creation. While Kaoru deeply loves his grandson, he is also keenly aware of how Wakana’s unique interests might make him feel alienated among his peers.

Kaoru is an elderly man with a balding head, wrinkled skin, and a traditional appearance that reflects his age and profession. He is often seen wearing kimono or simple traditional workwear, suited to the fine, careful work of doll-making. He has a gentle expression and carries himself with the quiet, refined demeanor of a master craftsman.

Though he may seem frail due to his age, Kaoru retains impressive precision and steadiness in his work. His eyes light up when talking about hina dolls or watching Wakana progress in his craft.

Kaoru is calm, wise, and deeply compassionate, though he speaks sparingly. He believes in letting people learn through experience and rarely interferes unless necessary. His love for Wakana is evident in the freedom he gives him to pursue his own path even when it diverges from tradition, such as helping with cosplay.

While he can appear stern or old-fashioned, Kaoru is open-minded and observant, showing quiet support for Wakana’s efforts and friendships. He values sincerity and dedication, and he takes great pride in seeing Wakana embrace his passion, even if it leads to non-traditional applications of their craft.

• Mentor and Guardian
  Kaoru’s role begins long before the events of the story, having raised Wakana and taught him the fundamentals of hina doll-making. His mentorship shapes Wakana’s personality particularly his sense of craftsmanship, discipline, and self-worth.

• Quiet Supporter
  Though he initially seems unaware of Wakana’s involvement in cosplay, Kaoru later sees the costumes and even meets Marin. He is not judgmental but rather impressed and quietly proud of Wakana’s ability to apply his doll-making skills to help others. Kaoru’s reactions calm nods or mild amusement show his approval without overstepping.

• Health and Concern
  There are moments in the story that hint at Kaoru’s aging and health, serving as a gentle reminder of time passing. These moments also highlight Wakana’s gratitude and responsibility, as he becomes more aware of everything his grandfather has done for him.