Nicolas Brown is one of the main characters in the anime series 'Gangsta'. He is a skilled mercenary and a 'Twilight', which means he has enhanced abilities due to a special drug. Despite being deaf, Nicolas is an exceptional fighter, using his expertise in hand-to-hand combat and swordsmanship. He works alongside his partner, Worick Arcangelo, in the city of Ergastulum, taking on various dangerous jobs. His stoic demeanor and strong sense of loyalty make him an intriguing and complex character within the series.