Benimaru Nikaido/Story

Orochi Saga
Benimaru is a young son of a multi-millionaire family. He is a professional fighter and part-time professional modeler who is very confident in his abilities. When Japan held a tournament for their country's representative team in the King of Fighters, Benimaru entered and made it to the finals. Despite his experience, he lost to newcomer Kyo Kusanagi and earned second place. He and Kyo enter the 1994 KoF tournament with the third place contestant, Goro Daimon. Eventually, he befriends his teammates and joins them for the rest of the saga.

The King of Fighters '99
After the climax of The King of Fighters '97, Benimaru resumed his modeling career and went on a world tour. He returns to Japan before the 1999 tournament due to an invitation he seemingly received from Kyo's pupil, Shingo. In reality, both Shingo and him were actually set up to join the "special team" with K' and Maxima. During the tournament finals, he learns about NESTS, a syndicate that is responsible for Kyo's disappearance. After he helps Shingo escape from the crumbling base, Benimaru continues to track NESTS to try and find Kyo.

The King of Fighters 2000
In the following year, Benimaru forms his own team with Shingo and his old friend, Seth. The agent also brings their final teammate, Lin. Benimaru hopes to use Lin's abilities to help his search for Kyo. In his team's ending, he saves Lin from Ron. After this encounter, Benimaru loosely trusts members from the Hizoku.

The King of Fighters 2001
Regardless of his search's results, he meets Kyo again in 2001. Looking to relive their glory days once more, he teams up with the old Japan Team and Shingo. Each member goes their separate ways after the tournament's climax.

The King of Fighters 2003
After he bails Shingo from a false arsonist accusation, he teams with him and Goro in the 2003 tournament.

The King of Fighters XI
Benimaru and Duo Lon are invited to Elisabeth Blanctorche's mansion. There, they discuss Ash Crimson's thievery of Chizuru's powers, the existence of Those From the Past, and their experiences during the 2003 tournament. The trio forms the Rival team and track down Ash. They find him after he steals Iori's powers. Benimaru sees Shingo and Kyo's beaten states and threatens Ash for an explanation. Before either members can interrogate him further, Ash teleports away and warns that Kyo will be next.

The King of Fighters XIII
Deciding to let Duo Lon do as he please, Benimaru returns from overseas to Japan. He first visits Chizuru to tell her about what happened in the last tournament, both aware of the dangers that come with Ash's new abilities. Excusing himself to meet with his teammates, he visits Shingo to learn the details of what caused Kyo's hospitalization. Goro arrives and they catch up during the meeting. With the current state of affairs and the invitations from "R" passed out, he and Goro decide to reunite the old team for the tournament. In the KOF XIII ending, he and Daimon both watch Kyo as he fights once again with Iori to an unknown result.

The King of Fighters XIV
When the tournament was announced, Saisyu summons the team into the Kusanagi residence, then informs them about a new threat which will cause untold chaos. He and Tung Fu Rue also requests the team to help his new students. Benimaru mentions the 'first generation' KOF champion that appeared while they were away and asks Kyo what he'll do about it. At Saisyu's request, the team enter the tournament once again.

After the tournaments conclusion, Benimaru asks Kyo about the new threat and agrees that if it comes back they'll just have to beat it again. He heads back to Japan with Daimon shortly after.

The King of Fighters XV
At the request of his old friend Kyo Kusanagi, Benimaru Nikaido is tasked to watching and protect the series' new protagonists Shun'ei and Meitenkun, forming the Fourth Saga's Hero Team, rather than being named China Team due to the nationalities of one of the three. As a result, the young model and fighter leaves the Japan Team, and replaces the old master Tung Fu Rue.