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Grand Szabo and the Grand Demon King Robots

The Mighty Quartet (メカ四天王) are the Gran Kingdom's quartet of robots commanded by General Szabo in the Blue Dragon series.


  • Silent Ku (沈黙のクウ): A cowboy/gunman-like robot who wields two guns. His upgraded form is called Grand Silent Ku. He is called Double Blaster Ku in the English dub of the anime.
  • Turbulent Mai (波乱のマイ): A spinning-top-like robot that uses swords. His upgraded form is Grand Turbulent Mai. He is called Knife Armed Mai in the English dub of the anime.
  • Raging Kesu (怒涛のケス): A witch-like robot that throws knives. He can cast negativity spells. His upgraded form is Grand Raging Kesu, but now has wings. He is called Flashing Bladed Kesu in the English dub of the anime.
  • Heat-Wave Sai (熱波のサイ): A large, round, floating orange robot who attacks with explosives. His upgraded form is Grand Heat-Wave Sai and has more spikes on his head and back. He is called Rocket Bomber Sai in the English dub of the anime.


The quartet are all Mecha Robos and sport a similar colour palette of dark purple, red, orange and yellow. They all lack legs and float like many other Mecha Robos. Their Grand forms all have additions to their appearances.


Blue Dragon[]

General Szabo awakens them when the heroes attack the flying fortress, and the party fights and destroys them one-by-one throughout the dungeon. The order they are fought is Silent Ku, Turbulent Mai, Heat-Wave Sai and finally Raging Kesu. Later on, they are revived along with their master with enhancements as 'Grand' mecha robos and fight the party all at once before they fight Grand Szabo. In the Cauldron Chamber of the Primitive Cube, their parts are used to create the body of 'Ultimate Szabo'.

While Szabo's body makes up the head, Silent Ku forms the torso, Heat Wave Sai forms the leg area (with some leg parts added), Raging Kesu forms the left arm, and Turbulent Mai forms the right arm. Even in this form, they are no match for the player's party.

Blue Dragon Plus[]

The quartet return in Blue Dragon Plus when General Szabo ends up under an evil control. They only appear in their Grand forms and as Ultimate Szabo.

Blue Dragon: Awakened Shadow[]

They make their return during a mid-game mission in the main story. Szabo, having seen the beauty of life, tries to convince them to change sides. They refuse, seeing only purpose in destruction and fuse with Destroy to become Demon King Destroy. Szabo is sad after their defeat since he hoped they could finally join him.


General Szabo unleashes them to attack Jiro and Minotaur. During the second attack, they merge with General Szabo to form "Ultimate Szabo." They are eventually destroyed by Jiro and Minotaur.

The combination for 'Ultimate Szabo' is different with Rapid-Bomber Sai in the middle, Knife-Armed Mai at the bottom, and Flashing-Bladed Kesu and Double-Blaster Ku as arms.


Silent Ku[]

  • Double Shot: shoots a party member twice
  • Gunman Mode
  • Cowboy Formation
  • Multi-Shot: shoots a party member three times

Turbulent Mai[]

  • Regular Attack: slashes twice at one party member
  • Turbulence: breaks the party's formation
  • Spinning Slash: deals multiple hits of damage on one party member
  • Anticipate: increases agility (higher chance to dodge attacks)
  • Vicissitudes

Heat-Wave Sai[]

  • Throw Bomb: throws a bomb at a single party member
  • Superheated Breath: breaths fire at the whole party
  • Raging Flames: a stronger version of Superheated Breath

Raging Kesu[]

  • Angry Waves: increases speed
  • Special Knife: throws knives at one party member
  • Knife Storm: shoots knives into the air which damages all party members
  • Storm and Stress: shoots knives into the air which decreases the element of every party member


Silent Ku[]

  • " invader? You may call me... Silent Ku... ... my style, my technique... you will die!" (first appearance, Blue Dragon)
  • "Let's roll, guys!" (Grand mecha-robos fight)
  • "Die!" (using a special attack)

Turbulent Mai[]

  • "Heh heh heh... So you're the ones that Szabo the master spoke of! I'm Turbulent Mai, as wild as the wind! And thanks to you, I'm free again! As a token of my gratitude... I'll show you some real fear!" (first appearance, Blue Dragon)

Heat-Wave Sai[]

  • "Mwa ha ha! I'll dash you all to bits! Smash and dash into bits and pieces! I'm Heat-Wave Sai. I've been locked up too long, and that makes me angry! You, and your friends, and everyone else and their friends, are gonna be blown away!" (first appearance, Blue Dragon)
  • "Take this!" (using a special attack)

Raging Kesu[]

  • "Heh heh heh... you took out all three of them? Not bad for humans. But you face Raging Kesu now, and I won't go down like those three did. I'm going to chop you up with great care... And relish every last second of it!" (first appearance, Blue Dragon)
  • "Die!" (using a special attack)


  • Despite having a very feminine appearance and voice compared to the rest of the quartet, Raging Kesu still uses male pronouns