Key Items are unique, non-consumable items that are vital for progressing the main story or unlocking specific side quests. They cannot be sold or discarded. Examples include the Spirit's Harp, which allows world travel, or specific keys to unlock doors. Always pay attention to descriptions of key items, as they often provide clues about their purpose or where they need to be used. If you're stuck, check your key items inventory to see if you've overlooked something important. Key items are typically obtained through story events or by completing specific objectives.
