Yusaku Kudo, a globally celebrated novelist and creator of the Night Baron mystery series, balances his literary career with familial roles as Shinichi Kudo’s father and Yukiko Kudo’s husband. His sharp intellect and deductive prowess, evident since youth, mirror traits inherited by Shinichi, while his professional rapport with Inspector Juzo Megure stems from prior collaborations on intricate cases before shifting focus to writing. A defining moment in Yusaku’s past occurred during a proposal dinner with Yukiko, where solving a murder case not only secured their marriage but also foreshadowed Shinichi’s later attempt to confess to Ran Mouri at the same venue. His novels, deeply informed by criminal psychology, feature the Night Baron as a testament to this expertise. Despite acclaim, Yusaku occasionally sidelines professional duties to travel with Yukiko or dodge editors, prioritizing personal whims over deadlines. In the "Conan Edogawa Kidnapping Case," Yusaku and Yukiko fabricated a kidnapping to assess Shinichi’s detective acumen and dissuade him from pursuing the Black Organization. Though Shinichi declined their urging, Yusaku acknowledged his resolve while remaining wary of associated risks. His strategic mindset often places him steps ahead of others, exemplified by deciphering coded messages from Shinichi’s childhood and impersonating Subaru Okiya to mislead Rei Furuya. Yusaku intervenes in cases primarily when Shinichi requires aid, such as interpreting Koji Haneda’s cryptic message to expose Renya Karasuma’s Black Organization ties—a discovery prompting his return to Japan. Non-canon appearances, like *The Phantom of Baker Street*, showcase his contribution to a Holmesian virtual reality module featuring avatars modeled after himself, Yukiko, and Hiroshi Agasa. His dynamic with Shinichi blends mutual respect and subtle rivalry, with Yusaku’s intellect frequently eclipsing his son’s. He nurtured Shinichi’s early fascination with detective work through exposure to crime scenes and analytical challenges. While Yusaku’s composed nature contrasts with playful tendencies—evading responsibilities or staging elaborate pranks—his underlying devotion to family safety remains unwavering. In *Episode One: The Great Detective Turned Small*, Yusaku and Yukiko briefly appear in Night Baron-inspired disguises, discreetly monitoring events tied to Shinichi’s transformation into Conan Edogawa. This special subtly revises earlier series elements, weaving later-introduced characters into the narrative while preserving Yusaku’s background influence. Though canon rarely explores his familial ties to twin brother Toichi Kuroba—the original Kaitou Kid—Yusaku’s interactions with figures like Agasa and law enforcement underscore his dual reputation as a literary icon and investigative ally.