The term 'Fairy Kin' is a collective term used to refer to mythical creatures such as elves, fairies, and sprites. The crossword solution for the term 'Fairy Kin' is 'ELF', which is a three-letter word. Elves are often depicted in folklore and fantasy literature as a diminutive, mischievous creature with magical powers. They are usually described as having pointed ears, wearing green or brown clothing, and living in forests. Elves are often associated with nature and are believed to be guardians of the natural world.