Undead

Undead (屍人, Shinin) is a general name for reanimated corpses that are raised by a caster and follow their bidding. They are also known as corpse soldiers (屍兵, shihei) and zombies (ゾンビ, zonbi).

Information
An undead can be made by the Sacrament of the Immortal King, a type of magic that returns a soul to the body it left. The forbidden technique was developed by a Witch who could completely resurrect the dead, making them look exactly as they had in life, though the spell has mostly faded from living memory and it is impossible to realize without a caster who has an innate aptitude for it. However, if the spell were to be successfully replicated, it could allow the deceased to be resurrected. It is only possible for a caster of the Sacrament of the Immortal King or a person given authority by the caster to control undead.

There are two main undead variant that have been presented in the overall story thus far; they are usually differentiated from one another by name. Basic undead that only follow simple commands are called corpse soldiers, whereas undead with abnormal vitality are dubbed zombies.

Corpse Soldiers
Corpse soldiers are an undead variant that are limited to have the capability to follow simple commands. They are manufactured with an incomplete version of the Sacrament of the Immortal King, and for that reason, their souls do not reside within their reanimated bodies. They can be resurrected as a rotting corpse, be resurrect after having their bodies preserved through magic, or, as seen with Theresia van Astrea, may even seemingly have their age reverted to a younger version of themselves. When a corpse soldier receives fatal damage and is unable to maintain its form, it is reduced to ash. However, some corpse soldiers have been observed to fulfill a lingering impulse or converse with other people before fully perishing.

Despite the great power that they may have had in life, a corpse soldier's martial capabilities are lessened from their original levels. They are also unable to feel pain, and can even survive what would typically be a mortal wound for a living person or function without vital body parts like the head.

Zombies
Zombies are are an undead variant with abnormal vitality. On two separate occasions, Aldebaran and Natsuki Subaru used their Earth knowledge to describe this type of irregular fauna as “zombies”. There are two types of undead known as zombies, both of which were created by Sphinx.

The first type of zombies were effectively moving corpses that had irregular energy, having the capability to move after a normal body's weak points, such as their heart or the neck, were destroyed. Their bodies were bloodless and due to the flaws in their creation, decomposed over time. These zombies were created from contaminated water containing parasites that turned people into undead. Once they were ingested, the parasites gradually took control of the brains of men and eventually gained full control over their bodies. When the parasites completely manifested in a body, they appeared as tentacle-like appendages which displayed the capability to move, and they acted as if they had a will to survive. Peculiarly, the parasites could not control children and most women despite residing in their bodies, with the exception of one undead woman who acted as the queen of the parasites.

Corpse Soldiers

 * Tholter Weasily
 * Pivot Arnancy
 * Libre Fermi
 * Kurgan
 * Theresia van Astrea

Zombies

 * Edda Rayfast
 * Balleroy Temeglyph
 * Carillon
 * Lamia Godwin
 * Palladio Manesque
 * Izmail
 * Eugard Vollachia
 * Valgren
 * Sphinx