Gate of the Twins Key

The Gate of the Twins Key is one of the twelve Zodiac Gate keys used by Celestial Spirit Mages to summon the Twins, Gemini.

Description
In the Manga, the key is depicted to be an ordinary golden key with the crest of the Twins, a symbol similar to two I's merged together, stamped on its bow. In the Anime, the key is still depicted as gold but is designed more intricately. The bow of the key is sculpted with the heads of Gemi and Mini, two circular faces with two dots for eyes and boomerang-shaped mouths, one in a smile while the other one in a frown with the blade of the key ending in a design similar to a harp.

Usage
While in possession of the key, a Celestial Spirit Mage may be able to summon the Twins Gemini, a pair of humanoid Celestial Spirits capable of transforming into other people, making them capable to use their Magic and read their memories.