Kuniharu Saiki is the father of the narrative's main protagonist. He works as a manga editor for Weekly Shounen Cognac, a publication similar to Shueisha. Professionally unreliable with poor judgment, he frequently proposes disastrous ideas that harm series under his care, like causing significant rating drops for *Silent Cyborg*. Despite these failures, he remains undeservedly optimistic about his contributions. His workplace behavior is excessively subservient, particularly towards chief editor Onimatsu Gokuya, including actions like licking shoes to curry favor. This submissiveness extends generally; he responds with excessive niceness even to rudeness or scorn. He struggles with deception, often offering unconvincing or easily disproven excuses. His family life is central. Married to Saiki Kurumi, they experienced early marital conflicts resolved after an intervention revealed their mutual affection measured at 38,689 on an emotional scale, leading them to stop quarreling. They now frequently display physical affection and loving language. He has two sons: eldest Saiki Kusuke, who generally ignores him but showed childhood affection through inventions; and youngest Saiki Kusuo, a powerful psychic. Kuniharu routinely exploits Kusuo's abilities for personal convenience, like repeatedly begging for teleportation to work, often using exaggerated emotional displays for manipulation. Despite this exploitation and occasional amusement at Kusuo's misfortunes, he exhibits genuine care, such as excitement when Kusuo gains a friend. He harbors underlying resentment over perceived disrespect from Kusuo, admitting he would have resorted to physical discipline without the psychic abilities. He fears his father-in-law, Saiki Kumagoro, who openly dislikes him and physically beats him, leading Kuniharu to consciously minimize any burden he might impose. Personally, he met his wife on November 22nd and married exactly one year later on the same date. An encounter with Nendou Riki's father in the past inadvertently facilitated his meeting with Kurumi. His paternal grandfather is deceased; his paternal grandmother is alive. He suffers from hay fever. Physically, he stands approximately 175 cm (5'9") tall and weighs around 64 kg (141 lbs). He typically wears professional attire like suits and ties for work, complemented by glasses. His hair color shifted from black in early appearances to brown. Beyond family, he has a notable dynamic with his son's classmate, Nendou Riki. Initially distrustful due to Nendou's delinquent appearance when introduced as Kusuo's friend, Kuniharu's perception shifted positively after Nendou complimented his Santa suit, leading to an unexpectedly rapid warming of relations.