Kazutoshi Gotō is a middle-aged detective with a tall, well-built, bear-like physique. He has short, spiky dark blue hair and brown eyes, typically wearing a standard detective uniform. His first name, Kazutoshi, means "sum interest."

Ten years before the main events, Gotō rescued a young Yakumo from a life-threatening situation involving Yakumo's mother. Gotō initially forgot this encounter but later recognized Yakumo during an attack in a park, fully recalling their past upon seeing Yakumo's distinctive red left eye. Despite his gruff exterior, Gotō maintains a long-standing professional relationship with Yakumo, frequently consulting him on cases involving paranormal elements. Their dynamic features mutual teasing, with Yakumo often joking about Gotō's marriage or implying romantic interest between Gotō and his subordinate, Ishii.

Gotō is married to Atsuko, though their relationship faces challenges, including periods of separation. The couple struggles with infertility, as Gotō cannot father biological children despite desiring parenthood. He fell in love with Atsuko at first sight, recalling specific details of their initial meeting like her clothing and hairstyle. Their marriage endures difficulties, with Atsuko providing crucial support during pivotal moments.

Following the death of Yakumo's uncle, Isshin, Gotō and Atsuko adopt Nao, Yakumo's deaf younger cousin. This adoption catalyzes Gotō's emotional growth. He becomes more openly expressive and protective, demonstrating fierce loyalty toward Yakumo and Nao. Prior to Nao's arrival, Gotō struggled to articulate his feelings, but fatherhood reshapes his capacity for vulnerability and commitment.

A habitual smoker, Gotō's tobacco use draws commentary from colleagues. Professionally dedicated, sometimes to the point of workaholism, he relies on Yakumo's unique abilities for supernatural cases, maintaining an intergenerational friendship characterized by deep trust and mutual respect. His partnership with subordinate Ishii evolves into a "Sensitive Guy and Manly Man" dynamic, highlighting their contrasting personalities.

Gotō's protective instincts lead him to risk his safety for loved ones, underscoring unwavering dedication to family and close allies. His journey reflects a transition from emotional reserve to engaged familial commitment through his role as Nao's adoptive father.