Demons

Demons are a race of vile, monstrous creatures who are some of the main antagonists during the course of the series. They originated from the Magical Dimension, Romagia. Some escaped to Alternate Earth during the course of Arc 1 (The Hero Heightening Project) and have lurked ever since.

All demons have different abilities, but the most common is fire powers. They possess horrid instincts which make them pursue humans for their blood and flesh. Their mortal enemies are the Heroes.

They are mostly invisible to humans, although a select few, such as babies, can see them. They become visible when they strike.

Appearance
Demons have various different personalities, although are easy to identify due to their exceptionally pale skin (exception to their true forms), sharp teeth and sharp features. They will also have rather strange pupils, typically thin slits quite similar to those of a cat’s. They will also have unusual eye colours and claws instead of nails on both their hands and feet. Demons can disguise themselves as humans, although some automatically look like humans - with a few differences, such as large horns or a forked tail.

Personality
Demons are typically very hostile towards humans, and as kind as possible in their demonic nature towards other evil species such as the Evales. They will not hesitate to eat humans, as is in their nature, and naturally hate heroes for always murdering their kind - hence why the Demon Princess starts going after them during the events of the Original Arc.

History
The first demon appeared 2,004 years ago in the THHP universe. Due to accidental experimentation, it was given immortality. The demon lurks somewhere (either in Earth or Romagia) to this day, and legend says it can only be destroyed by a legendary sword.