Nanamori operates as the cameraman for TV Nanana's three-member Expedition Team, a financially struggling network. He appears as an anthropomorphic banana character, notably featuring a unibrow. His core duty is capturing footage during team assignments, primarily their quest to document the legendary Kraken across diverse ocean locations and remote islands.

Throughout the Kraken expedition, Nanamori endures numerous challenges alongside director Nanaoka and assistant director Nanayama. These include perilous sea voyages on inadequate vessels, capture by pirates, and becoming stranded on islands. His role places him in situations demanding adaptability, such as facing engine failure at sea or being held for ransom. During their island survival, Nanamori encounters a mysterious isolated house with unusual inhabitants, leading to unexpected involvement in reality television scenarios. This experience brings a temporary surge in popularity, though subsequent competition complicates the Kraken pursuit.

His professional journey involves seeking specialized assistance to advance the Kraken mission, including visiting an octopus-themed pub and collaborating with Master Takohashi, an expert octopus hunter whose skills aid in locating the creature. Nanamori participates directly in strategic efforts to lure out the Kraken, including a plan resulting in Nanayama's capture by the creature. The expedition concludes with a confrontation against an organization asserting cryptid likeness rights, positioning Nanamori and the team in a conflict over broadcast rights and ratings.

Details about Nanamori's background prior to TV Nanana, his origins, or personal history remain unavailable. Similarly, no details exist regarding his involvement in any movies, OVAs, or spin-off media related to the franchise. His character development occurs exclusively within the documented expedition events, focusing on his professional responses to escalating challenges.