Engels are giant monstrous creatures fused with human and Nazzadi DNA, encased in locking mecha armour, and controlled by a pilot sitting inside a uterine-like control chamber within the Engel. They are essentially organic mecha. The pilot controls the Engel via the Engel Synthesis Interface, or ESI, and often bonds emotionally with it during their service lifetime. Engels have been known to go on rampages provoked by bloodlust or strong emotions, and consequently are considered very dangerous battlefield weapons.

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