Natural Enemy

**Natural enemies** (天 (てん) 敵 (てき) , *Tenteki*?), alternatively known as **Predators**, are the enemies of humanity in their respective worlds who make up the main antagonists of *Versus*.

## Overview

Natural enemies as a term refers to the absolute predator within a world. Identical to how birds prey against insects or snakes prey against frogs, natural enemies are noted for their complete domination of the human race. With these nigh insurmountable dynamics in play, the extremely harsh odds for victory leads to the crux of the plot. With each world attempting to have another hopefully give aid at the same time through various means, all thirteen lands in dire straits coalesced into one.

Alongside weaknesses specific to their respective origins, predators are also potentially susceptible to attacks of foreign worlds due to sheer unfamiliarity. This is not guaranteed to be effective however, as these gaps in knowledge can be compensated for with adaptation or by simply being more capable in general. Depending on the goals and interests in question, different kinds of natural enemies could also begin strife with each other, although the outcomes of such battles are unknown.

## List of Natural Enemies

This is a list of natural enemies for which contains what information is available so far. In reality, there is a certain kind of entity that threaten humanity's existence in each of the 13 different worlds.

### Demons

Native to the Magic Forces World, the **Demons** (魔 (ま) 族 (ぞく) , *Mazoku*?) are the first type of natural enemy introduced. Having assailed the local humankind for generations, almost all of the world had been conquered by the Great Demon Army, with the 47 Demon Kings controlling select areas across the globe under the rule of the Great Demon King. With a vague aquatic motif tying together the number of races united under one banner, most Demons hunt their prey using the "scent of blood", although the adept can also pinpoint magic. Through the strength of the leading class and an unending number of subordinates, the Demons' infernal subjugation has gotten to the point where humanity's prospects of survival has been compared to "a single candle flame amidst gusts of wind"

In regards to potential conflict with other natural enemies, Demons so far have displayed a undisturbed attitude as long as their goals are not interfered with, exemplified by their Kings' casual assessment of the transformation the environment has undergone. A mindset that could change once the situation has been observed more thoroughly and other predators comparable in strength to the Great Demon Army has registered, but only a smattering of this implication has reached them. In other words, any hasty aggression on their part seems to be unlikely against those who do not resemble humans. This grace period naturally meets a violent end as soon as an offending party dares to challenge them.

There seem to be a variety of malefic and hostile wild beasts that live within the same tainted regions that harbor Demons, but it remains unclear if they belong to the same category. Regardless, these creatures do not come off as threatening as those in positions of power, nor gather in numbers as great as the more common members of the army.

Overview of the Great Demon Army, an army formed by Demons of all kinds in the Magic Forces World.
### Robots

The **Robots** (ロボット, *Robotto*?), the second type of natural enemy introduced, are the natural enemies originating from the Machine Rule World. Originally created by the humans of their world, they are composed entirely of inorganic material. Due to the rapid evolution of artificial intelligence, they became berserk and went on to pursue humanity's extinction as a repercussion, multiplying without limit and conquering 80% of their world with constantly updating tactics and models. As of the present, their standard armor renders even the special heat and kinetic based weaponry wielded by the local resistance ineffective.

Robots primarily align only with themselves, attacking any animate being with an energy source without discrimination. Being able to detect the amount of energy their targets emit, they choose the ones with the highest amount to prioritize. This means that the robots fight against both inhabitants and natural enemies of other worlds as a matter of course, making them especially prone to conflict. On the other hand, if one does not possess a distinguishable source of energy, they could hypothetically be left alone.

Overview of some of the robots from the Machine Rule World.
### Parasites

The **Parasites** (パラサイト, *Parasaito*?) originating from the Parasite World have managed to take over the majority of humanity, turning them into puppets. They can assume control of the brain without any indication, and leave bulbous masses growing out of both people and inanimate objects, presumably as an extension of their biology.

They are also fully capable of controlling species outside of humanity. The fallout of the 13 worlds merging allowed the parasites to infect other races such as a Giant.

Overview of some of the parasites from the Parasite World.
### Giants

The **Giants** (巨 (きょ) 人 (じん) 族 (ぞく) , *Kyojinzoku*?) who reign over the Giants' World have enslaved most humans. Having a natural advantage in both size and strength, they are quick to attack anyone that shows hostility, as well as feast on humans. However, the capture of docile humans for slave labor on a whim is also possible. For them, humans are nothing but mere toys, food and garbage, which they dispose at will. Giants are violent by nature, even in their calm state.

Giants are highly territorial, attacking any other natural enemy that treads on their turf while leaving behind their mountains of corpses to scare them off. To expand giants' territory further, they spread their destruction and these structures in all directions. Upon facing other creatures, especially other natural enemies that can kill them, they recognize them as enemies and go all out to massacre them.

Overview of some of the giants from the Giants' World.
### Calamities

The **Calamities** (大 (だい) 怪 (かい) 獣 (じゅう) , *Dai kaijū*?) are enormous kaiju monsters from the Misfortune World that have destroyed cities and countries. Each one is reportedly at least 500 meters tall.

### Aliens

The **Aliens** (宇 (う) 宙 (ちゅう) 人 (じん) , *Uchūjin*?) emerged from space to invade the Cosmic Devil World many decades ago.

### Untamed Wilderness

The **Untamed Wilderness** (大 (だい) 自 (し) 然 (ぜん) , *Daishizen*?) are lifeforms belonging to the Wild Green World that have undergone excessive evolution and have overtaken the dwellings of humanity. From plants to mammals to insects, it seems this sweeping change towards size and lethality has been indiscriminate, with each being of notable threat.

### New Humanity

The **New Humanity** (新 (しん) 人 (じん) 類 (るい) , *Shinjinrui*?) is a strange race of humans with advanced physical and mental capabilities originating from the Neo-Cruelty World who are attempting rule over old humans. In contrast to their distinct fashion senses, the New Humans are perfectly in sync, with each and every civilian equally capable of using a knife to great effect alone or in a collaborative effort. This unison extends to their personalities to the point that any of them can act as a voice for the collective opinion. Having a hobby of giving hope and then denying it to their perceived inferiors for the sake of sadism, attempted invasion is treated as mostly unworthy of notice despite the potential casualties.

They hold a severe lack of empathy and detachment to emotions other than their cruelty to the 'old humanity' whilst seeing the other races and species as simply new toys, despite the evident destructive nature and unstudied power said races can possess. New Humanity unanimously agrees that even something comparable to a natural disaster is of no issue when dealt to them as long as the losses are kept within a certain range.

Overview of some of the new humans from the Neo-Cruelty World
### God

**God** (神 (かみ) , *Kami*?) originating from the Mad God's World has manifested from humanity's faith. Assumed to always be watching, errant comments made in opposition are feared for their ability to draw it's wrath.

### Curse

The **Curse** (呪 (のろ) い, *Noroi*?), which plagues the Cursed Destruction World, causes it to become cold and rotten along with polluting it's oceans. It can also infect individual life as something with a resemblance to illness with no known cure.

### Games

The **Games** (ゲーム, *Gēmu*?) that has it's humanity convinced it makes up everything in the Recreation Hell World.

### Lawless Thugs

The humans consisting of lawless bandits and gangs originating from the Lawless World roam the surface and do what they please.

### World Tree

The **World Tree** (世 (せ) 界 (かい) 樹 (じゅ) , *Sekaiju*?), which has taken root in the Huge Tree World, is sucking up the planet's life, leaving it parched and withered. The roots seem to be spreading in real time across a continent at least, shifting significant amounts of land in the process.