u/Due-Pen890

Trying to identify an anime (watched on Netflix ~2019) Japanese anime, colorful/vibrant art style Genre: fantasy + sci-fi mix Protagonist: adult male, black hair, clean military uniform (no camouflage pattern), works as a detective/investigator for the government He is called "Master" by his assistant Assistant is a female character called "Zero", stays in a control room with large monitor screens, uses a headset and monitors missions via drone The world has flying machines that people use There is a dangerous island that hunters/adventurers go to for profit One episode: protagonist investigates a case where a brother poisoned his other brother and they find the bones Watched on Netflix around 2019 Any idea what this is?