Copy Magic

Mimicry is an unnamed Caster Type Transformation Magic.

Description
User can transform into anyone flawlessly. Unlike normal Transformation Magic, this Magic allows the user to gain the transformed person's knowledge, Magic and their recent thoughts (if not while they are thinking about them in real time). The amount of information that the user can access is, of course, limited to the knowledge that the genuine counterpart is actually aware of, and nothing more beyond that. The transformation is hold for only five minutes, and contact must be made in order to transform. The user can only retain the capability to transform up to two people, and any more additional transformation requires them to erase the older one of the transformed forms. The user can also transform itself into a near target without touching, but this restrains the appearance of the clone to the appearance that it had last time they have contact.

Ichiya Vandalay Kotobuki
As Ichiya, Gemini can use Ichiya's Perfume Magic. They also said that he's thinking only about perverted things. Gemini transformed in Ichiya while they were own by Angel, in order to gather information about Light Team's plan and defeat Jura Neekis with the guard down.

Gray Fullbuster
As Gray, Gemini can use Ice-Make Magic with the same level of Gray's original Ice-Make Magic. Gemini transformed in Gray while they were own by Angel, first to defeat the real Gray in the Battle against Light Team and then to fool Natsu Dragneel and fight Lucy Heartfilia.

Lucy Heartfilia
As Lucy, Gemini uses a whip as a weapon. They can even summon other Spirits, and control Spirits summoned by the original Lucy. Gemini can also distract male enemies with her attractive body. During the Grand Magic Games, Lucy combines her Magic power with Gemini transformed into her and together they cast Urano Metria. However, the spell was cancelled by another Mage before its effects could be seen.