Shinjuku

Shinjuku (新宿) is one of the Brotherhood of Kyoji.

Background
Shinjuku was an orphan who became a pupil of Kyoji Gekko. Shinjuku stood out as a genius — his talents, knowledge, and determination were considered by Paul Gekko to be that of a prodigy seen once in a generation. Shinjuku is a Close Friend of Riku. Shinjuku is a Childhood Friend of Reina.

Trivia

 * Shinjuku the Shinobi was named after the City in Tokyo.