Obelisk Force

Obelisk Force (オベリスク・フォース Oberisuku Fōsu) is an elite group of Duel Soldiers with the highest rank in the Academia. All of its members wear blue uniforms and helmets clearly designed after "Obelisk the Tormentor". Their rank is based on the Obelisk Blue rank from Yu-Gi-Oh! GX.

Maiami Championship
When Serena appeared in the Standard Dimension, she eventually warned Declan that Obelisk Force would come to pursue her. Therefore, Declan organized the third round of the Junior Youth Championship into a city-wide Battle Royal. As Declan expected, Obelisk Force eventually interfered, as three Duel Soldiers captured Ashley, Bram and Carl, sealing them in cards. This was witnessed by Yuya Sakaki, who proceeded to fall into a state of rage and challenge them. Despite Obelisk Force attacking Yuya repeatedly, they were shocked to see him apparently unfazed. Six other Duel Soldiers appeared before Serena, but were intercepted by the Youth participants of the MCS.