The Gemini Vertex (ジェミニ・バーテックス), also known as an Futago Type is an enemy of humanity, and the twelfth and thirteenth Vertex the Hero Club encounters. It is based after the constellation Gemini the Twins.
- They appear as a humanoid in stocks with a very long beard that it used to attack when needed.
- Their running style resembles a monkey running in stocks.
- They do not rely on engaging the Heroes, instead relying on their extraordinary speed to dash towards the Shinju-sama.
- Due to their apparently low combat power, the Heroes tend to leave this Vertex alone and focus on the other Vertex that follow it, which is its original intention. They would only realize that it slipped past their defenses too late to perform adequate defensive measures.