Dream Eaters

The Dream Eaters are creatures that appear in Dreams. There are two types of Dream Eaters: ones that "eat dreams and plant nightmares", referred to as Nightmare Dream Eaters, and ones that "eat nightmares", referred to as Spirit Dream Eaters.

The Dream Eaters are the form darkness takes in the sleeping worlds, as Heartless and Nobodies cannot enter.

However, while the Nightmares attack Sora, Riku and the player during their adventures, the Spirits are their allies.

Design
Like the Unversed, Heartless, and Nobodies, Dream Eaters come in many shapes, sizes, and colors.

They resemble real-world animals, and they bear emblems that designate them as either Spirits or Nightmares.

While Spirit Dream Eaters are brightly colored, Nightmares are less vibrant.

A Spirit Dream Eater's Disposition determines its eye color, while Nightmares' eyes are round, red, and lack pupils.

Characters that become Dream Eaters have emblems on their bodies in accordance with their roles.

Riku, a Spirit Dream Eater, has the appropriate sigil on his back.

Meanwhile, the Armored Ventus Nightmare has one emblazoned on its helmet.

Nature
Dream Eaters exist in the Realm of Sleep, where they consume the dreams and nightmares of its denizens.

Nightmare Dream Eaters outnumber Spirits, which Sora and Riku must create by collecting the necessary recipes and dream pieces.

Spirit Dream Eaters enjoy affection and love playing with Training Toys.

Their Disposition determines their eye color and how they behave during combat, while Paint Guns can be used to alter their body color.

Spirits lend their power to Sora and Riku via the Link System, and they can compete against others of their kind in Flick Rush tournaments.

Appearance (Spirits)
Spirits are the more friendly version of the Dream Eater species.

They are generally light-colored and usually have black and yellow eyes with pupils of differing shapes, varying for each different Dream Eater.

The only possible exception to this rule would be the Lord Kyroo Dream Eater, that appears to be light-colored both as a Spirit and as a Nightmare.

All Spirits seem to be animal-based, and often appear similar to certain types of Heartless.

In terms of the rest of their outward appearance, Spirits are generally rather colorful, displaying many different colors, though a patch of yellow seems to be the only recurring theme for each type.

Additionally, the colors of your party's Spirits can be customized.

Appearance (Nightmares)
Nightmares are usually darker in coloration, similar to a Heartless's palette, but their glowing eyes are red and get darker towards the center.

Like their Spirit counterparts, Nightmares often come in a range of different colors, with purple appearing to be the dominant theme.

In its Nightmare form, it seems that Lord Kyroo does indeed have a small patch of purple.

Status
Active (Both Spirit and Nightmare)