Fuyuhiko Rokudo, an archaeologist whose ill-fated decision to gift his daughter a New Guinean statuette ignites the central conflict, unknowingly unleashes the sealed god of destruction, Ongo, by removing its two embedded gems. This pivotal act stems from his career-driven focus on artifact acquisition, inadvertently destabilizing his family through supernatural repercussions.

His strained dynamic with his daughter arises from his persistent view of her as a child, clashing with her emerging maturity—a recurring tension framing their interactions. A July 2009 newspaper date visible within the narrative anchors the timeline, situating his choices within a specific temporal context. His professional environment, rooted in mid-2000s technology, features a Macintosh 9500/200MP computer.

Expanded media depictions explore familial scenarios: a hot spring excursion disrupted by supernatural phenomena and domestic vignettes, such as his daughter unintentionally interrupting a private moment between him and his wife. These moments underscore his dual role as an archaeologist balancing fieldwork with paternal duties, occasionally overlooking familial nuances. The English adaptation’s minor name alteration remains tangential to his core identity as a professionally driven yet personally conflicted figure.