The series takes place in 2009.
"Rosa del Inca" is a market designation frequently given to the mineral rhodochrosite, especially in Europe.
Monica Rial has been in all installments in the girls-with guns trilogy, but has only had the lead role in Noir (2001).
Unlike it's predecessors Noir and MADALX, El Cazador does not feature a sock-puppet parody by the English voice cast and crew.