German police commissioner stationed in Ibiza. Known for unconventional investigative methods and deep cross-cultural expertise. Leads inquiries into a bioweapon-related 'red rain' incident and a complex culinary murder case, consistently demonstrating dedication and resourcefulness.
Works alongside Kluge to navigate bureaucratic and corporate interference.
Scientific advisor assisting in identifying the microorganism in the rain samples.
Local contact providing crucial street-level intelligence and warnings.
Professional associates collaborating on evidence gathering and case logistics.
Direct antagonists; Costa investigates while Schönbach orchestrates the deadly experiments.
Core investigative partners working together to solve the red rain murders.