Shinobu Godai 吾代忍

Godai worked for a small finance house which was ruled by the underworld. In a complicated situation Neuro made a bet trade with all the members of the finance house, and after Neuro solved the mystery of the boss's death, Neuro got their office and chased them out. However, Neuro thinks that Godai might be useful, so "employs" him (by force) as a jack of all trades for Katsuragi's detective office. Godai is sometimes called "Neuro's second slave". Godai mostly acts like a rogue - he is quick-tempered, gets angry easily, and yells a lot; but unexpectedly he is also a methodical man, responsible and trustworthy. (from wikipedia)