Signature card

A Signature Card is one (or more) particular card(s) a duelist uses in almost all their Duels and is most associated with them. Signature cards tend to be the most likely to have Alternate artworks. In Yu-Gi-Oh! 5D's, the character's signature card tends to be a Synchro Monster and/or an Accel Synchro Monster.

Some video games have a similar concept known as a Key Card, in which the player selects a certain card as their "ace". The selected card will glow when summoned/activated, and a small bonus will be earned for using the card.

Yu-Gi-Oh!

Character	Signature Card(s)
Yami Yugi	Dark Magician Dark Magician Girl Kuriboh Egyptian God Cards
Yugi Muto	Silent Swordsman LV0 Silent Magician LV0 Gandora the Dragon of Destruction
Seto Kaiba	Blue-Eyes White Dragon Blue-Eyes Ultimate Dragon Obelisk the Tormentor Crush Card Virus
Joey Wheeler	Red-Eyes B. Dragon Flame Swordsman Gilford the Lightning Time Wizard
Téa Gardner	Magician of Faith Shining Friendship Dark Magician Girl
Tristan Taylor	Cyber Commander Super Roboyarou
Ryo Bakura	Change of Heart
Solomon Muto	Exodia the Forbidden One Ancient Dragon
Serenity Wheeler	Goddess with the Third Eye St. Joan
Duke Devlin	Strike Ninja Orgoth the Relentless
Yami Bakura	Dark Necrofear Destiny Board Diabound Kernel
Mai Valentine	Harpie Lady Sisters Harpie's Pet Dragon
Johnny Steps	Musician King Heavy Metal King
Keith Howard	Barrel Dragon Fiendish Engine Ω (R) The Wicked Eraser (R) Zera the Mant
Mako Tsunami	The Legendary Fisherman Fortress Whale
Weevil Underwood	Perfectly Ultimate Great Moth Insect Queen
Rebecca Hawkins	Shadow Ghoul Guardian Angel Joan Diamond Head Dragon
Rex Raptor	Tyrant Dragon Black Tyranno Red-Eyes B. Dragon Serpent Night Dragon
Paradox Brothers	Gate Guardian Dark Guardian
Maximillion Pegasus	Toon World Relinquished Thousand-Eyes Restrict
Hobson	Zombiemaster
Cyber Kaiba	Automatic Giant
Seeker	Exodia the Forbidden One
Espa Roba	Jinzo
Arkana	Dark Magician
Strings	Revival Jam Slifer the Sky Dragon
Lumis and Umbra	The Masked Beast Masked Beast Des Gardius
Marik Ishtar	The Winged Dragon of Ra
Ishizu Ishtar	Exchange of the Spirit
Odion Ishtar	Mystical Beast Serket Cathedral of Nobles
Noah Kaiba	Shinato, King of a Higher Plane Hino Kagu Tsuchi
Gozaburo Kaiba	Exodia Necross
The Big Five	Five-Headed Dragon Deepsea Warrior Robotic Knight Perfect Machine King Nightmare Penguin Jinzo Judge Man Berserk Dragon
Alister	Air Fortress Ziggurat Gorlag
Valon	Psychic Armor Head Double Cloth Armor
Rafael	Guardian Eatos Guardian Dreadscythe
Dartz	The Seal of Orichalcos Divine Serpent
Vivian Wong	Dragon Lady
Shimon Muran	Exodia the Forbidden One
Priest Seto	Blue-Eyes White Dragon
Thief King Bakura	Diabound
Anubis	Pyramid of Light Theinen the Great Sphinx
Yakou Tenma	The Wicked Avatar The Wicked Eraser The Wicked Dreadroot
Gekkou Tenma	Angel O7
Deschutes Lew	Castle Gate
Tilla Mook	Vampire's Curse
Kirk Dixon	Machina Force Machina Soldier Machina Sniper Machina Defender Commander Covington
Pete Coppermine	Mutant Mindmaster
Maico Katou/Mrs. Maico	Green Baboon, Defender of the Forest
Mendo Cino	Dreadscythe Harvester
Willa Mette	White-Horned Dragon
Reiko Kitamori	Puppet King
Depre Scott	Zeta Reticulant Greed Quasar
Masumi Momono	Tualatin
Henry Tudor	Dark Magician
Tea (DOR)	Dancing Elf
T. Tristan Grey	Karbonala Warrior
Joey (DOR)	Flame Swordsman
Bakura (DOR)	Dark Plant
Margaret Mai Beaufort	Harpie Lady
J. Shadi Morton	Millennium Golem
Jasper Dice Tudor	Exodia the Forbidden One
Weevil Underwood (DOR)	Basic Insect
Rex Raptor (DOR)	Two-Headed King Rex
Darkness Ruler	King of Yamimakai
Necromancer	Pumpking the King of Ghosts
Keith (DOR)	Slot Machine
Pegasus Crawford (DOR)	Illusionist Faceless Mage
Ishtar (DOR)	Witch of the Black Forest
Richard Slysheen of York	Battle Steer
C. Seto Rosenkreuz	Blue-Eyes White Dragon
Mako (DOR)	Kairyu-Shin
Manawyddan fab Llyr	Skull Knight Chakra
Deck Master K	Airknight Parshath Birdface Fairy King Truesdale Injection Fairy Lily King Tiger Wanghu Kryuel Luminous Soldier Maiden of the Aqua Molten Behemoth Patrician of Darkness Robotic Knight Serpentine Princess Slate Warrior Tactical Warrior The Illusory Gentleman Thunder Nyan Nyan Twin-Headed Behemoth Wolf Axwielder

Yu-Gi-Oh! GX

Character	Signature Card(s)
Jaden Yuki	Elemental Hero Flame Wingman (season 1) Elemental Hero Neos (season 2-) Winged Kuriboh Elemental Hero Terra Firma (manga)
Alexis Rhodes	Cyber Blader Doble Passé Machine Angel Ritual
Syrus Truesdale	Power Bond Vehicroid Connection Zone Super Vehicroid - Stealth Union
Tyranno Hassleberry	Super Conductor Tyranno Ultimate Tyranno Black Tyranno
Chumley Huffington	Des Koala Master of Oz
Chazz Princeton	Armed Dragon LV10 Ojama Trio VWXYZ-Dragon Catapult Cannon Light and Darkness Dragon (manga)
Brier	Goblin King
Howard X Miller	Monster Register
Belowski	Mokey Mokey
Bastion Misawa	Water Dragon Swordsman of Doom Lithmus Plasma Warrior Eitom
Zane Truesdale	Cyber End Dragon Cyberdark Dragon Cyber Dragon Power Bond
Kagemaru	Raviel, Lord of Phantasms Uria, Lord of Searing Flames Hamon, Lord of Striking Thunder
Prince Ojin	Satellite Cannon
Camula	Vampire Genesis
Lyman Banner	Macro Cosmos Helios Trice Megistus
Aster Phoenix	Destiny Hero - Plasma Destiny End Dragoon Vision Hero Adoration (manga)
Nightshroud	Darkness Darkness Neosphere Red-Eyes Darkness Dragon (as Atticus) Clear Vice Dragon (as Yusuke) Clear World (as Yusuke)
Atticus Rhodes	Red-Eyes Black Dragon The Atmosphere (manga)
Jesse Anderson	Rainbow Dragon Crystal Beast Ruby Carbuncle Princess of Butterflies (manga)
Axel Brodie	Volcanic Doomfire Electro Sergeant (manga)
Jim Crocodile Cook	Fossil Fusion The Tyrant Neptune (manga)
Adrian Gecko	Cloudian - Eye of the Typhoon Exodius the Ultimate Forbidden Lord Sealed Mantra (manga)
Vellian Crowler	Ancient Gear Golem
Blaze	Thestalos the Firestorm Monarch
Frost	Mobius the Frost Monarch
T-Bone	Granmarg the Rock Monarch
Thunder	Zaborg the Thunder Monarch
The Supreme King	Evil Hero Malicious Edge Super Polymerization Dark Fusion
Yubel	Yubel Armityle the Chaos Phantom Rainbow Dark Dragon (as Jesse)
Trueman	Dark Archetype
Masked Knight of Anger	Anchor Knight
Masked Knight of Laughter	Fool Clown
Masked Knight of Impassivity	Silent Pain
Yusuke Fujiwara	Honest
Sartorius	Arcana Force Ex - the Light Ruler Arcana Force EX - The Dark Ruler
Sarina	Infinite Fiend Summoning Mirrors God of Darkness - Dark God
Professor Viper	Vennominon the King of Poisonous Snakes Vennominaga the Deity of Poisonous Snakes
Seika Kohinata	Evil Dragon Ananta
David Rabb	The Big Saturn
Reggie MacKenzie	Splendid Venus Tethys, Goddess of Light

Yu-Gi-Oh! 5D's

Character	Signature Card(s)
Yusei Fudo	Stardust Dragon Junk Warrior Majestic Star Dragon Shooting Star Dragon Lightning Warrior (manga)
Jack Atlas	Red Dragon Archfiend Majestic Red Dragon Scar-Red Nova Dragon Heavenly King Black Highlander (manga)
Akiza Izinski	Black Rose Dragon Queen of Rose (manga)
Luna	Ancient Fairy Dragon Kuribon
Leo	Power Tool Dragon
Crow Hogan	Black-Winged Dragon Blackwing Armor Master
Hunter Pace	Supersonic Skull Flame
Bolt Tanner	Giant Ushi Oni
Aero & Blister	Machina Sniper
Trudge/Sector Security	Goyo Guardian Montage Dragon Gate Blocker
Greiger	Flying Fortress SKY FIRE Dark Strike Fighter Earthbound Immortal Chacu Challhua (as a Dark Signer) Explosive Beast Valcanon (manga)
Gill Randsborg	Masked Knight LV7
Commander Koda	Mad Profiler
Professor Frank	Ido the Supreme Magical Force
Sayer	Thought Ruler Archfiend
Kalin Kessler	Hundred-Eyes Dragon (as a Dark Signer) Earthbound Immortal Ccapac Apu (as a Dark Signer) Infernity Doom Dragon
Carly Carmine	Earthbound Immortal Aslla piscu (as a Dark Signer)
Misty Tredwell	Earthbound Immortal Ccarayhua (as a Dark Signer) Dragon Queen of Tragic Endings (as a Dark Signer)
Roman Goodwin	Underground Arachnid (as a Dark Signer) Earthbound Immortal Uru (as a Dark Signer)
Devack	Zeman the Ape King (as a Dark Signer) Earthbound Immortal Cusillu (as a Dark Signer)
Rex Goodwin	Earthbound Immortal Wiraqocha Rasca (as a Dark Signer) Sun Dragon Inti (as a Dark Signer) Moon Dragon Quilla (as a Dark Signer)
Placido	Machine Emperor Wisel Infinity
Ghost	Ally Salvo
Rudolph Heitmann	Ancient Gear Golem
Dexter	Batteryman AA
Sly	Eccentric Boy
Bob	Flamvell Guard
Patty	Hanewata
Sherry Leblanc	Fleur de Chevalier Centaurumina
Bruno	Tech Genus Blade Gunner MAXX-10000
Lucciano	Machine Emperor Skiel Infinity
Lotten	Gatling Ogre
Mizoguchi	Determined Daredevil
Bolger	Blood Mephist
Andore	Thunder Unicorn Naturia Leodrake (Fast Power Deck)
Breo	Voltic Bicorn
Jean	Lightning Tricorn
Team Catastrophe	Hidden Knight -Hook- Doom's Ray
Jose	Machine Emperor Grannel Infinity
Familiar of Scar-Red Nova	Yomi Ghoul Wicked King of Yomi - Mictlan Coatl
Skeleton Knight	Underworld Dragon Dragonecro
Paradox	Malefic World Malefic Paradox Dragon Malefic Truth Dragon