The Embryo Storage – New units, known also simply as Es-N, are eight antagonists in XBlaze – Code: Embryo. They are mindless artificial beings who answer only to Sōichirō Unomaru, their creator. The ninth Es-N was in development at the time of her sister units and creators death; she was adopted by Mei Amanohokosaka.

Artificial, mindless beings who answer only to their creator, Sōichirō Unomaru. The eight Es-N units are frighteningly powerful and often act in packs. They are powerful enough to even hold out against the Original Grimoire.

The first of the Es-N units appeared in front of Es and Tōya Kagari. She was ordered to attack the both of them, catching up to Es after they fled. Having had Es' battle data stored in her memory banks, she was able to fight with a definite advantage against the older unit. The unit was unable to keep up as Es developed during the battle, making all previous data useless; the unit was killed.

Four more units guarded Sōichirō as he talked to Tōya about his ideals. When ordered to attack, they stabbed their weapons into each of his arms and legs, pinning him. The remaining three units attacked Es several hundred floors above where the other four remained, however, the three units were destroyed by Mei Amanohokosaka and Kuon Glamred Stroheim. The last four units attempted to take on Sechs of the Ten Sages when he arrived, but were immediately killed within mere seconds.

After the death of her sister units and Unomaru, the last Es-N was adopted by Mei Amanohokosaka. She proves to be a valuable asset in the extraction of Drive-Infected Patient.