- "One of many Stellazzio in the world. Gemini thought by the river, 'I will sing her a song.' He didn't know where she was, but he hoped his song would reach her."
- —Final Fantasy IX.
The Gemini Subligar is one of the thirteen Zodiac subligaria, which can obtained from a Fomor Thief in specific level-capped dungeons around Tavnazia. It is used to obtain the "Rapparee Harness," a light armor worn by Thieves and Dancers.
The Esper Zalera, aligned with the element of Death, embodies the sign of Gemini. The image of the "Twins" is obvious in that Zalera carries a shamaness with him on one of his wings. In the International version, the Gemini emblem is represented by the Machinist job. Gemini Gems are dropped by Giant-type enemies.
Gemini is one of the twelve Zodiac Stones, and one of the seven to contain a Lucavi demon. The stone contained the Death Seraph, Zalera, and was in the possession of Marquis Elmdore. When Elmdore was fatally wounded in the War of the Lions, he offered his soul to Zalera in order to remain amongst the living. When Ramza Beoulve storms Elmdore's residence at Limberry Castle, the Marquis gives himself to the stone once more and becomes the Death Seraph.
Gemini is also a zodiac sign used to determine damage compatibility between characters during battle. Gemini has optimal compatibility with Sagittarius, good compatibility with Libra and Aquarius, and bad compatibility with Virgo and Pisces.
The Gemini Recipe appears as a trade accessory.