Naobito Zenin/Synopsis

History
At some point, Naobito met with Toji Fushiguro to discuss Megumi Fushiguro being sold to the Zenin clan.

When Maki Zenin decided to leave the clan and return later to become the head, she informed Naobito and he started laughing. He then suggested to make it a bit harder for her, but Maki didn't care what he was going to do. As Naobito mentioned Mai Zenin, Maki got angry and told him that she got nothing to do with this.

Shibuya Incident Arc
On October 31, Naobito is with Nobara Kugisaki and Maki at Shibuya Mark City Restaurant Avenue Entrance when they meet up with Akari Nitta. Naobito then listens as Akari informs them about the situation and how they will be on standby for now.

Later when the civilians are being attacked by mutated humans, Naobito along with Nobara and Maki head into the screen to protect the humans. After they head inside the curtain, Naobito does nothing but drink while the others deal with the mutated humans.

Naobito and Maki wind up meeting with Kento Nanami and the three head to the Shibuya Station. Along the way, Naobito tries to get Maki to leave but Maki reveals that Naobito has been drinking on the job. When the three encounter a cursed spirit, Naobito quickly uses his technique to attack the spirit. When the spirit spit up a ton of skeletons, Naobito wonders just how many humans the spirit had eaten. When the spirit had shed its skin, Naobito figures that the spirit was a spirit womb just a moment ago. As the cursed spirit, Dagon, releases a torrent of water at the sorcerers, Naobito manages to defend himself from the current. After defending himself, Naobito starts to talk to Dagon about how many frames within an animated sequences, but Dagon ignores him and stated that he and his cursed spirit allies all have names.

Naobito, along with Nanami and Maki, then attack Dagon all together but Dagon manages to defend himself. Naobito comments about how strong Dagon is and figures what Dagon might be capable of. Naobito, Nanami, and Maki then attack Dagon with speed based attacks, and manage to for Dagon to retreat. Naobito manages to overwhelm Dagon, which force Dagon to use his Domain Expansion. Noabito manages to defend himself from Dagon's Expansion's sure hit technique with his Falling Blossom Emotion technique. Dagon then uses his Death Swarm attack, which Naobito manages to counter the attack but his view is blocked. Naobito is suddenly blown away by Dagon and then engulfed by multiple fish. Naobito manages to survive but loses his right arm. Naobito continues his fight with Maki, but retreat when Nanami gives them the signal. Naobito heads to the hole that Megumi created, but is surprised when Toji enters through the hole.

Naobito calls out to Toji but notices that something is wrong with him. Naobito then watches as Toji takes on Dagon, and is shocked by how Toji fights while using Playful Cloud. When Dagon tries to escape from Toji, Naobito stops Dagon which lets Toji pierce Dagon with Playful Cloud. When Toji exorcises Dagon, Naobito wonders if Toji is on their side.

As Toji takes Megumi to another location, Naobito's attention is more focused on the arrival of Jogo. As Jogo manages to take care of Maki and Nanami, Naobito manages to evade Jogo's attack. However, Jogo manages to hit Naobito with 2 Disaster Flames, immolating the 26th head of the Zenin clan. Jogo then leaves when he senses one of Sukuna's fingers being released.

Itadori's Extermination Arc
On death's door from his injuries from Jogo, Naobito was extracted from Shibuya to the Zenin household. Before passing away, he instructs Furudate to read his will to Ogi, Jinichi, and Naoya Zenin.