Daemon/Devil Lord

Devil Lords (悪魔王), also known as Demons (魔神), are the final stage of evolution for Daemons. They only come into existence when a powerful daemon meets all 3 requirements of a "name", "body", and "awakening". They're beings of monstrous power and even have the potential to stand on even footing with True Dragons.

Appearance
Devil Lords, just like their predecessor Daemon Lord and Arch Daemon evolutions, possess an almost entirely human appearance. The only non-human features they possess are the iconic claws, horns, and wings found on all members of the daemon race, although these can easily be hidden at their discretion. Their appearance, like that of all spiritual-lifeforms, is dictated entirely by their self image. They might have been influenced by a body they previously inhabited or developed their own appearance naturally without the influence of other individuals.

Devil Lords all belong to a specific color lineage, with their color being apparent in their appearance. The color of a daemon's sclera will usually match their lineage and, although not always, other parts of their body match this color as well. Examples include, but are not limited to, hair color, iris color, and skin color. The color of their clothing usually also reflects the color of their lineage.

Trivia

 * Aside from Guy Crimson, all the other primordials evolved into Devil Lords through Rimuru by using a secret technique developed by Raphael.
 * Even Guy Crimson couldn't evolve Rain and Misery into Devil Lords with his knowledge, proving just how difficult the secret technique was.
 * Guy tried to learn the secret technique but Rimuru used Diablo to keep him distracted.