Apoptosis

Ilias: "It's called the apoptosis effect, a mutation phenomenon caused by unordered space-time itself. It acts as an immune system of this twisted spacetime, so to speak. It mutates organisms from its environment to repel foreign invaders."

Ilias, at the 1st Tartarus

Apoptosis is an immune mechanism phenomenon of twisted dimensions that appears in Monster Girl Quest: Paradox. It changes life forms and inorganic materials into strange creatures in order to make the spreading chaos slow by 'deleting' the beings from other dimensions, thus preventing inter-world interactions(which are fruitless endeavours since the chaos spreads too fast), acting like white blood cells to eradicate germs (dimension-to-dimension interaction). Also, it is an irregular bio-erosion variation of holy and dark energy. Apoptosis creatures are only found in Tartarus.

According to young Promestein`s research, there are some apoptosis creatures that have identical appearances, behaviour, and even memories(Luksl, for example). It seems like each type of apoptosis creatures are the replicants of the same individual who turned into an apoptosis creature(yet, there`s no way to find out who is the original).

High class Apoptosis creatures
Adramelek

Low class Apoptosis creatures
Sully

Jade

Shesta

Eater

Riot

Luksl

Valt

Vetala

Vitae

Shinifa

Unknown
Nuruko