Fiends are often depicted as malevolent beings or creatures in folklore and mythology. They are typically associated with evil or harmful intentions, often causing trouble or chaos. In various cultures, fiends can take on different forms, such as demons or spirits, and are frequently portrayed in literature and art as antagonists. In modern usage, the term "fiend" can also refer to someone who is excessively enthusiastic or obsessed with a particular activity or interest, such as a "music fiend" or "video game fiend." This usage highlights a strong passion rather than a negative connotation, showing how language can evolve over time.