Sword Art Online Keychains. Sword Art Online Shop. Are you a fan of the popular anime series Sword Art Online? Do you find yourself constantly searching for new ways to show off your love for the show? If so, then you’ll be excited to hear about the newest addition to the Sword Art Online Shop: Sword Art Online keychains! Read on to learn more about these amazing accessories and how they can add a special touch to any fan’s collection.