Demon

The Ether is the realm of many things, including emotions. When someone among the spheres feel something, it resonates within the Ether. When they feel it strongly, it resonates strongly too. And if one person feels something intensely enough, or if enough people do at the same time, that emotional resonance can coalescence into a being. A demon.
Born out of this emotion, demons are drawn from the Ether by the link to the spheres and fall into reality. They start out with little but their body and their core emotion ,the emotional focus that gave birth to them. Demons gain power and nourishment from evoking that emotion in themselves and others. For this reason, they seek to tempt others into engaging in the same passion that birthed them. Their methods usually start out crude, simply extolling the virtues of their core emotion, but as they grow in age and power, their personality becomes more complex and they usually find more subtle ways to encourage their particular desire.
Born from the Ether, demons are powerful and should not be taken lightly. In combat they are not only blessed with extremely tough bodies, they are usually also equipped with potent natural weapons, such as claws, teeth and horns, with which they can easily dismember their enemies. Furthermore, many demons can summon powerful magical equipment bound to them, tools of their particular trade. They are also capable magicians, brimming with occult energy. All in all, demons usually have plenty of options for dealing with foes and the smarts to utilize them to their fullest.

Basic Information

Anatomy

Demon physiology varies wildly between type and in fact doesn't need to even closely correspond to conventional biology. In general, they are strong and tought. Their bodies are supernaturally resilient and physical weapons are remarkably inefficient unless blessed by divine powers. Their entire being is suffused with darkness, making it pretty much ineffective against them. Each individual type of demon usually has even further powers.

Genetics and Reproduction

Demons are formed fully from the Ether and do not reproduce. Depending on type, they may be capable of intercourse for any number of reasons other than reproduction. The closest demons come to reproducing is propagating enough strong emotions among mortal races that they indirectly help create new demons of the same type as themself.

Growth Rate & Stages

Newly formed demons start with a monomaniacal personality, depending on their type. They usually start out obsessed with engaging in their particular emotion and tempting others to engage in it too. The longer they live, the more they tend to gain layers of complexity to their selves, building on that core interest they were born with.

Ecology and Habitats

As creatures from the Ether, they don't have a role in the wild and are in fact more interested in societies. There their role is very dependent on their type, but they usually seek to promote inerests that support their core emotion and limits things that would inhibit it.

Dietary Needs and Habits

Demons are emotivores. They gain sustenance from engaging in their primary emotion and from tohers nearby engaging in it too.

Additional Information

Social Structure

Demons are social creatures. They need to be, in order to engage with their core emotion and tempt others to succumb to it. How exactly this functions is very dependant on the type of demon.

Geographic Origin and Distribution

As creatures of the Ether they can pop up anywhere and in fact does so. There's not a sphere that isn't home to some type of demon or another.

Average Intelligence

Demons are very intelligent comapred to your average person, if prone to occasionally suffer from tunnel vision where their core emotions is concerned, which can occasionally blind them to the obvious.

Perception and Sensory Capabilities

Each type of demon usually has enhanced senses that helps them out in a particular niche depending on their kind.

Civilization and Culture

Naming Traditions

Naming varies wildly, though overall there is a trend toward complexity and guttural sounds.

Average Technological Level

Demons tend to be very urban and embrace all that it brings.

Scientific Name

Natus Ex Animo

Lifespan

Does not age

Average Height

Varies wildly

Average Weight

Varies wildly

Average Length

Varies wildly