Polaris' key is of simple design similar to other silver keys. The bow is shaped like a bear cub's head with an upside-down white heart, at the center is a yellow orb within a silver diamond. The blade is of simple design, shaped as a four tipped snowflake with several yellow orbs.
While in possession of the key, a Celestial Spirit Mage may be able to summon the Bear Cub Polaris by reciting the quote, "Open Gate of the Bear Cub! Polaris!". This summons Polaris, a giant mechanical pink bear capable of stopping enemies with its huge size.