Niko, whose full name is Narutoshi Ishikawa, is a supporting member of the Hikari Club in Litchi DE Hikari Club. He is deeply devoted to the club’s leader, Zera, and is willing to carry out any order without question. His loyalty is so absolute that he willingly gives his right eye to be used as a component for the club’s robot, Litchi. Zera appoints him the number one ranking member, designated as Eins.

At the beginning of the story, Niko is portrayed as a depressed and sulky individual. His disposition changes significantly after he forms a friendship with fellow club member Tamiya, becoming shy and cheerful in Tamiya’s company. This friendship represents a key emotional anchor for Niko, softening his previously gloomy nature.

Niko’s role in the narrative is defined by his unwavering obedience and eventual tragic downfall. He witnesses an intimate encounter between the members Jaibo and Zera, an event that leads to his capture. He is subsequently burned alongside Tamiya, sustaining critical injuries. Later, after being accused of being a traitor, Niko kills Zera by striking him with a urinal. Niko then dies from the severe burn wounds he had sustained earlier. His story arc moves from a loyal follower blinded by devotion, through a transformative friendship, to a grim end marked by betrayal, violence, and self‑destruction.