Nate Nanjo

Description
Kei "Nate" Nanjou is a snooty rich boy who is heir to a family fortune. He shares an almost paternal bond with his butler Yamaoka, who has been taking care of him in place of his parents. Kei wields long swords and broadswords, is a crack shot with a sniper rifle, and his Persona gives him Light and Earth elemental powers.

In Game
Kei is also witness to the the bet between Masao Inaba and Hidehiko Uesugi about the effectiveness of the demon summoning game "Persona". Like Yukino Mayuzumi, he chooses to just watch, thinking that everyone was just catering to Masao's stupid endeavors. Nonetheless, he sees the crying little girl following the end of the ritual, and is sent to the border of consciousness and unconsciousness afterwards.

When the group was told by their teacher to go to the hospital and get a checkup, Kei's butler Yamaoka meets them at the school gate, offering to take everyone to the hospital via the Nanjou family's limousine. Kei refuses, wanting to walk with his friends instead. Yamaoka yields, but secretly follows Kei to the hospital.

When the ICU where Maki Sonomura was being treated disappears after a small earthquake, the group decides to move to the lobby to call anyone who could help. Kei is shocked to find Yamaoka sprawled on the hospital lobby floor, mortally wounded by a demon attack. Yamaoka knows that he is not long for this world, and his dying wish is that Kei would become a great man someday even after he has gone. Kei flies into a rage, awakening to his Persona along with his friends and destroys the demons that killed Yamaoka. He resolves to fulfill the late butler's wish, find out what caused the sudden influx of demons in Mikage-cho (Lunarvale), and bring the person responsible to justice.

In the NA version, Kei is the only playable character given an actual last name to substitute the Japanese one, making him the heir to the Trinity Family trust instead of the Nanjou Group. His full name became Nate Trinity, and was given blond hair and fairer skin to match the localization.

Persona 2
Kei later makes an appearance in both Innocent Sin and Eternal Punishment. In Persona 2: Innocent Sin, he is a supporting character who appears at the Abandoned Factory in Konan, drawn to rumors that a person resembling Takahisa Kandori is in Sumaru City (The person in question turns out to be Reiji Kido, who isn't too happy about being mistaken as his hated half-brother). When you talk to him, Kei will give Tatsuya Suou his ultimate weapon. During the invasion of Hitler's Last Battalion, he joins his former classmates to fight against the Nazis unless certain conditions are met earlier in the game.

In Persona 2: Eternal Punishment, he is a playable character. Sneak mentions that there are two people (a man and a woman) investigating the New World Order. If Maya spreads the rumor that the person with information on the NWO is a man, you will get Kei to join. He now uses katanas like Tatsuya, and when using his demon contacts, Kei still mentions his beloved butler Yamaoka, and how he intends to honor the promise he made years ago to become the #1 man in Japan as the latter watches over him from above.

Kei will take the group to a Science Lab run by Tatsuzou Sudou and funded by the Nanjou Group, where youths who allegedly performed the Joker Curse are kidnapped and drained of Kegare. The party will run into Kei's old classmates Reiji Kido and Maki Sonomura around the sewer entrance, assisting in their covert infiltration by working the floodgates. Kei will rejoin the rest of his former classmates later in the game (with Tatsuya taking his place in Maya's party), fighting off the New World Order soldiers that are trying to take over the city.

Trivia

 * Kei has but one weakness, and that is the silly-sounding pharmacy song played in the chain of drugstores owned by the Tadashi family. This proverbial crack in Kei's armor first manifested in Persona, and still haunts him up to now in Eternal Punishment. Kei simply cannot stand it, and feels like he's being hypnotized upon hearing it in any form.


 * In Eternal Punishment, Kei often zealously lauds his self-styled swordsmanship as a victory cry, and also quotes common Japanese proverbs and idioms, most notable of which is "A frog in the well knows nothing of the great ocean." (井の中の蛙大海をしらず)


 * Also in EP, When certain conditions are met in the game, Kei can develop a special contact with Baofu called "Song Of A Baseball Fan" where he gets into a quarrel with the latter over which baseball team is the greatest after listening to a possibly pre-recorded baseball commentary from a radio broadcast. This parallels the typical debates in real-life Japanese baseball fandom.


 * Takeharu Kirijou mentions in Persona 3 that the Kirijou Group was once part of the Nanjou Group. This is a direct reference to the group of companies that Kei currently owns.


 * Kei appears on the TV show Who's Who, also in Persona 3. Trish describes him as a man in his 20's who is proud of his intelligence, and also mentions that he can be readily identified because all the #1 designs on his clothing.