"Night Watcher" is a term often used to describe a person or entity that observes or monitors activities during the night. This can include security personnel, surveillance systems, or even fictional characters in literature and film. The role of a night watcher is to ensure safety and security, often in dark or secluded areas. In popular culture, the concept of a night watcher can be found in various forms, such as the Night Watch in George R.R. Martin's A Song of Ice and Fire series, where members guard against threats beyond the wall. The idea evokes themes of vigilance and protection during vulnerable hours.