The Twelve Princedoms Bleed Blue

 Origin

The Princedoms are the fractured heirs of Emperor Gregor. When he died without naming a successor, his bloodline splintered into twelve rulers, each claiming a share of the throne.

None can claim it fully. To sit the throne would mean total war, eleven siblings against one.

What holds them together is the one thing that sets them apart from all other humans: their blood runs blue.

The Blue Blood

Not symbolism. Not dye. Biology. Imperial blood is chemically distinct, its oxygen carriers creating a deep indigo hue.

Blue blood marks them as other, proof they are not baseline human. Whether this is evolution, divine design, or some ancient experiment, no one knows, and they don’t care.

Bruises bloom violet. Tears shimmer faintly blue. Even their sweat stains indigo in cloth. There is no mistaking it.

To commoners, this is divinity. To the princes themselves, it is proof of their right to rule.

The Mark of the Imperium

A relic device from Gregor’s reign, every court holds one. It is a crown of steel needles set into glass.

The Mark pricks the skin and draws a drop of blood. If the blood is red, the device stays cold. If it is blue, the Mark ignites with light and heat.

No one can fake it. No one can counterfeit it. The Mark is the ultimate proof of legitimacy.

Succession is decided by the Mark. If a prince dies, their child (or sibling) is tested. If the blood burns blue, the crown is theirs.

The Code of Blood

The princes and princesses may hate each other, feud, and undermine, but they will never spill each other’s blood.

Killing a sibling achieves nothing: the Mark will simply ignite for the next heir. The blood endures, untouchable.

This code isn’t morality. It’s survival. The moment one prince betrays the bloodline, the whole inheritance fractures. Every princedom fears civil collapse more than defeat.

 Structure of Rule

Each princedom is an absolute monarchy. The prince/princess is sovereign, divine, and final authority.

Nobles beneath them serve as knights, stewards, or generals, but they rule only at the pleasure of blue blood.

There is no parliament, no council. Only the blood commands.

Military Power

Bloodlocked Mechs:

Mech Warriors: Thirty-foot juggernauts, ancient but numerous.

Mech Knights: Refined personal war machines, each bonded to a single prince or princess. These are execution writs on legs.

Mech Lords (Devilkiller Engines): Colossal machines dormant since Gregor’s death. They require not just blue blood, but the throne itself. Every princedom guards one as its ultimate inheritance.

Armies: Conscripts and knightly orders fill their ranks. Drilled from birth, they serve not out of love but because service to blue blood is seen as holy duty.

Politics

Rivalries: The princes feud endlessly. Border raids, trade wars, contests of honor. Their hatred is real.

Limits: None will ever cross into blood betrayal. Their wars are ritualized, humiliation, sabotage, and show-of-strength, never regicide.

Unity: What keeps them from collapse is their shared enemy: the Green Zone. Whatever their internal hatred, they’d rather every sibling live than see the Nine triumph.

Culture

Imperial Blood as Divinity: To commoners, blue blood is godhood. Festivals celebrate it. Children swear loyalty oaths “to the blue.”

Symbols of Blue: Banners, wine, armor trims, all dyed indigo. To drink blue-stained wine is to bind yourself to the bloodline.

Oaths and Honor: Oaths sworn to a prince are unbreakable, because to break one is to deny the blood itself.

Rituals:

Coronation: The Mark draws blue blood before the court. The ignition marks the reign.

Death Rite: When a prince dies, their blood is poured into a steel basin. The glow lingers for days — proof that even in death, the blood burns.

Tournaments: Feuds are settled in the field through knightly contests. Blood is spilled, but never blue blood.

Rivalries in Detail

Prince Arel of Drosk: Reckless hunter, raids as sport. Beloved by soldiers, despised by siblings who have to clean up his messes.

Princess Selai of Branthorn & Prince Ederic of Kess: Famous rivals, constantly outdoing and humiliating each other, but bound by the Code of Blood. Their contests are legend.

The Silent Pact (Veylin & Ossith): Their fleets always arrive together. They deny alliance, but their loyalty to each other is obvious.

Religion & Belief

They venerate Emperor Gregor as the First Blue Blood, a demigod who bent gods and devils alike.

Most reject the gods outright. To kneel to divinity would diminish Gregor’s defiance. To worship anything beyond blood is considered blasphemy.

Weaknesses

Division: They cannot unite without a throne. Rivalries bleed strength.

Bloodlock: Their greatest weapons are useless without imperial blood.

Rigidity: The Code of Blood prevents treachery, but also limits flexibility. They’d rather lose than break it.

Everyday Life

Commoners: Feudal life under crushing taxes and endless conscription. But every peasant takes pride in serving living gods.

Nobles: Knights and wardens whose honor lies in how much blue blood they protect.

Ceremony: Indigo dyes, public duels, oaths shouted before Mech husks. Even the poorest serf lives in the shadow of ritual.

Tone

The Princedoms are fractured but unbreakable. Their rivalries are bitter, their hatred real, but blue blood binds them. They will not betray it, no matter the cost. To them, the Green is a lie, the Nine are usurpers, and humanity without blue blood is livestock.

They are the last children of the Emperor, and they intend to inherit the world.