Their essence was implanted in the pencil of an animator named Lori. When her energy reached its peak, the Gemini Warriors appeared from the pencil to drain her energy. Their tails are connected to each other, giving them more power. Sailor Moon, Sailor Mercury, and Sailor Mars fought them, but the red Gemini Warrior used Mars Fire Ignite, and the blue Gemini Warrior used Mercury Bubbles Blast. They were winning at first because of this, but argued over who should finish them off, and over whose attack it was that defeated them. Eventually they disconnected their tails from each other. Sailor Moon, Sailor Mercury, and Sailor Mars combined their Moon Tiara Magic, Mercury Bubbles Blast, and Mars Fire Ignite to destroy them.
Their names are derived from the constellation Gemini, which they are the manifestation of like Leo the Lion.
- The Gemini Warriors are the final Negamonsters sent to gather energy.
- This is the second time Sailor Moon and Sailor Mars combine their attacks, and the first time they do so with Sailor Mercury.
- The color of each twin represents the attacks of Sailors Mercury and Mars, blue for Mercury and red-orange for Mars.