Heartless

Heartless are aggressive yet emotionless entities of pure darkness that serve as the main antagonistic force in the Kingdom Hearts video games. These monsters, though named "Heartless", are actually formed from the hearts of sentient beings that have allowed the darkness within their hearts to consume them. The result is the birth of a new Heartless creature, a mindless beast driven to seek out and feed upon the darkness in people's hearts.

Nature
Pureblood Heartless are natural Heartless, born from the darkness in people's hearts. They are ink-black in colour, with yellow beady eyes. They are more common in places that are close to or saturated in darkness. Upon their destruction, they simply disappear in puffs of darkness, without a heart leaving its body.

Emblem Heartless, on the other hand, were originally created from machines that reproduce the process of a heart being consumed by darkness. Afterward, stolen hearts can become Emblems. They have more varied shapes, colours, and are branded with the symbol of the former Keyblade Master Xehanort to differentiate them from the Pureblood ones. They are more common on the worlds within the Realm of Light, and usually mimic the shape of creatures or objects within that world.

Heartless, Emblem or Pureblood, possess several key characteristics that define them as Heartless. Most Heartless are created when the darkness that resides in a person's heart consumes him or her, thus giving the darkness shape and form; this process will occasionally also form Nobodies, which are born from the body and soul left behind when the heart is lost. Being born from darkness, they are mindless and act on instinct, their only goal is to find hearts, and consume them to create more Heartless. But what they desire above all are the hearts of worlds, and thus they enter worlds in search of the way into the hearts of the worlds. When they consume these colossal hearts, the remains of the world form new worlds, such as Traverse Town and the End of the World.

At the same time, Heartless seek out the users of the Keyblade, since the Keyblade holds the power to lock and unlock hearts. In order to stop the users of the Keyblades, the Heartless use the Keyblade itself as a homing beacon, but ultimately desire to take the heart that commands it. Because of this, Keyblade wielders are under constant attack.

The strength of a Heartless is proportional to the depth of the darkness from which it was born. The darker the heart forming a Heartless, Emblem or Pureblood, the more powerful and more monstrous the resulting being will be. An exception to this is Xehanort's Heartless, who retained his human appearance for unknown reasons. This is a contrast to Nobodies, which determine rank according to the strength of the heart, and whose appearances become more human as they increase in power. Furthermore, as beings of elemental darkness, the Heartless are able to take possession of other beings or even inanimate objects, granting them immense dark power and often reshaping their very forms to suit their purpose.

The Heartless, being mindless, usually have no master to direct their actions and instead act on the instinct to gather more hearts. However, there are some higher beings who can command them. Heartless will obey those with an affinity for darkness and a strong will. If many people attempt to control them, the Heartless will side with whomever is most powerful. Those with hearts, such as Maleficent, endanger themselves however, as the Heartless are attracted to their hearts and if they show weakness, the Heartless will not think twice of consuming their hearts.

On the other hand, higher ranking Heartless, like Xehanort's Heartless, can fully command other Heartless without endangering themselves. Also, Organization XIII is able to command them as well with their strong wills, but are not endangered of being consumed by them for their lack of a heart.

Heartless make use of the "corridors of darkness", inter-dimensional pathways that connect the many worlds. These pathways are located in the Realm of Darkness, and thus are very dangerous to use if one is not accustomed to the darkness.

Pureblood

 * Shadow
 * Gigas Shadow
 * Mega-Shadow
 * Shadow Sora
 * AntiSora
 * Darkball
 * Invisible
 * Orcus
 * Bit Sniper
 * Neoshadow
 * Novashadow
 * Gargoyle Knight
 * Gargoyle Warrior
 * Possessor
 * Massive Possessor
 * Darkside

Emblem

 * Soldier
 * Air Soldier
 * Lance Soldier
 * Bandit
 * Luna Bandit
 * Powerwild
 * Bouncywild
 * Sniperwild
 * Large Body
 * Fat Bandit
 * Pirate
 * Air Pirate
 * Screwdiver
 * Defender
 * Wizard
 * Fortuneteller
 * Hammer Frame
 * Black Fungus
 * White Mushroom
 * Rare Truffle
 * Pink Agaricus
 * Red Nocturne
 * Blue Rhapsody
 * Yellow Opera
 * Green Requiem
 * Black Ballade
 * Crimson Jazz
 * Emerald Blues
 * Silver Rock
 * Spring Metal
 * Pot Spider
 * Pot Scorpion
 * Barrel Spider
 * Aquatank
 * Sea Neon
 * Sheltering Zone
 * Angel Star
 * Battleship
 * Aeroplane
 * Hot Rod
 * Chimera
 * Gargoyle
 * Search Ghost
 * Trick Ghost
 * Wight Knight
 * Nightwalker
 * Shaman
 * Necromancer
 * Driller Mole
 * Graveyard
 * Living Bone
 * Wyvern
 * Guard Armor
 * Rabid Dog
 * Creeper Plant
 * Dire Plant
 * Fire Plant
 * Blizzard Plant
 * Poison Plant
 * Dark Plant
 * Armored Knight
 * Morning Star
 * Bookmaster
 * Runemaster
 * Barrier Master
 * Cannon Gun
 * Camo Cannon
 * Ice Cannon
 * Switch Launcher
 * Jumbo Cannon
 * Devastator
 * Reckless
 * Magnum Loader
 * Strafer
 * Surveillance Robot
 * Toy Soldier
 * Aerial Knocker
 * Aerial Champ
 * Assault Rider
 * Bolt Tower
 * Fiery Globe
 * Icy Cube
 * Snowy Crystal
 * Rapid Thruster
 * Hook Bat
 * Befuddler
 * Crescendo
 * Flare Note
 * Bubble Beat
 * Rainy Loudmouth
 * Tornado Step
 * Minute Bomb
 * Bulky Vendor
 * Rare Vendor
 * Parasite Cage
 * Stealth Sneak
 * Trickmaster
 * Pot Centipede
 * Behemoth
 * Shadow Stalker & Dark Thorn
 * Illuminator
 * Mushroom XIII
 * Prison Keeper
 * Storm Rider
 * Blizzard Lord & Volcanic Lord

Special Heartless

 * Ansem
 * World of Chaos
 * Experiment