Nephilim

The Nephilims are the natural offsprings of a Goddess and a Demon, being Tristan Liones the only known case.

Overview
Nephilims are beings that possess both the power of darkness and the power of light.

Appearance
It can be assumed that Nephilims would possess appearances according to those of their parents.

Physiology
The Nephilims can manifest either of their inherited Demon and Goddesses's powers, even both at the same time, being reflected in their black eyes and Demon Mark and orange eyes with a triskelion, respectively. They can also summon either dark wings or angelic wings to being able to fly.

Powers and Abilities
Being a hybrid between the Demon and Goddess Clans, the Nephilims possess both their characteristic holy and demonic powers, such as Ark and Hellblaze.

Trivia

 * s are described in other ways depending on the mythology they're taken from, in other sources, they're described as Giants, as Fallen Angels, or as Angel and Human hybrids.
 * Though not a Nephilim, Mael could use both dark an light powers temporarily, while he was being corrupted by the Commandments he absorbed.
 * Using her powers, Melascula mixed souls of both Goddesses and Demons souls summoned from the afterlife, to bring up a creature with similar characteristics.