Obelisk Force

The Obelisk Force (オベリスク・フォース Oberisuku Fōsu) is an elite group of Duelists ranking the highest in Academia in the Yu-Gi-Oh! ARC-V anime. They are loyal to the Professor and carry out his orders without question.

Appearance
All the members of the Obelisk Force wear blue uniforms and helmets that are modeled after "Obelisk the Tormentor". They have crystals on their helmets of the colors red, yellow, and green.

Past
Three years prior to the present storyline, the Obelisk Force helped Reo Akaba capture Serena and Reiji Akaba. They dragged Serena back to Academia and placed an interdimensional teleportation device on Reiji Akaba's wrist to send him back to the Standard Dimension.

Present
The Obelisk Force were sent by the Professor to aid Sora Shiun'in in bringing Serena back to Academia. They appeared in the Ancient Ruins Area and defeated Ashley, Bram, and Carl. However, Yūya Sakaki, who had seen them turn the Knight of Duels into Cards, turned berserk and challenged them to a Duel.