The character known as "Uomo Lupo" (Wolf Man) attends university classes without formal enrollment as a mysterious figure, initially concealing his nature as the last surviving Japanese werewolf. During his courtship with Hana, he voluntarily reveals his true identity by transforming under a full moon, demonstrating trust and deepening their relationship. This revelation does not deter their romance, leading to the birth of two children who inherit his lycanthropic traits.

He actively shares parenting responsibilities with Hana despite the challenges of raising hybrid offspring in an urban environment, driven by a primary motivation to protect and provide for his family. This instinct compels him to hunt in wolf form during harsh weather shortly after his son's birth, resulting in his accidental death. His demise leaves Hana solely responsible for safeguarding the children's secret and guiding their development.

His legacy persists through his children. Daughter Yuki, born during snowfall, initially embraces her wolf heritage, while son Ame, born during rainfall, later fully adopts his wolf identity as guardian of the forest. Their divergent paths—Yuki integrating into human society and Ame embracing the wilderness—reflect the inherited duality from their father. His influence surfaces when Hana sees a vision of him during a pivotal moment; he expresses pride in her parenting and affirms their children's chosen destinies.

No official spin-offs, sequels, or additional media expand upon his backstory, childhood, or experiences prior to meeting Hana. His character remains defined by his role as a partner and progenitor whose choices set the narrative's events in motion.