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Leo Akaba, also known as The Professor, is the main antagonist in the anime series Yu-Gi-Oh! ARC-V. He is the husband of Henrietta Akaba, the father of Ray and Declan and the adopted father of Riley. He was a member of the Original Dimension, masterminding of the Duel Academy attacks by the Xyz Dimension who initiative devised in the Arc Project and Revival Zero had designed to returns home and to see his daughter, Ray.

He was voiced by Daisuke Namikawa in Japanese and Billy Bob Thompson in English.


Leo is the tall man has a brown skin middle-head bald and blue eyes. He has a purple militaristic outfit on his black buttons with the outfit of Vellian Crowler, the purple cape has the black ending and gray boots. He wears a black belt has the red line who has cover by the end on his front, which has appears on his left red circular strings on the chest, he also wears a black gloves. Leo was noticeable are traits who had armored plate by his side on the head that will be circular lens to proved on his blood vessels at the head.

As a young, he has the full head with gray hair, he wears a blue shirt and dark gray pants. On the Duel Monsters experiments, he wears a lab coats. Even the members of the Akaba family, he was the spade, although from his spade-shaped collar coat and Spirit Deck.


Leo was an benevolent and inventive was traveling from the Fusion Dimension, expect using the ARC to desire System by considering and dueling Yusho had the friend. However he regaining seems case a heartless to abandon at his family and home, he was sent his back to Paradise City, lacking at the empathy from the people where came steal into cards. He was believing justified, he doesn't punished by his soldiers from the fail at contest who former his subordinate Jean-Michel Roger.

Leo has a strong hatred for Z-ARC, whom abused his hologram technology and became a monster that nearly destroyed the world; forcing him to create the Natural Energy cards that broke the dimensions (and unintentionally both Z-ARC and Ray) apart. Despite this, Leo wasn't pragmatic enough about dealing with Yuri - Z-ARC's Fusion Dimension fragment; he could have killed him, forever ensuring that Z-ARC couldn't fully revive, but instead chose to make Yuri his enforcer. Instead, Leo channeled his hatred towards Yuya, whom had absorbed Yuto by accident.

Leo loved his daughter very much, but was ignorant of her will. He hoped to revive her by effectively killing her fragments and forcibly merging them back into Ray; completely uncaring that they had their own lives and loved ones. After his failure, Leo fell into a depression; ultimately realizing he had wasted years of his life trying to bring back someone who didn't wish to revive (costing six other lives in the process as Yuya and Zuzu had absorbed their fragments).


  • While seen as the main antagonist throughout the series (with the revelation about Z-ARC making him pale in comparison), Leo ultimately is more a misguided altruist.


           Yu-Gi-Oh logo.pngVillains

Dark Yugi | Shadi | Seto Kaiba | Mokuba Kaiba | Yami Bakura | Maximillion Pegasus | Croquet | Pegasus' Guards | Duke Devlin | Marik Ishtar | Yami Marik | Odion Ishtar | Mr. Ishtar | Weevil Underwood | Rex Raptor | Paradox Brothers | Bandit Keith | Sid | Bonz | Zygor | Panik | Gozaburo Kaiba | Thief King Bakura | Jinzo | Diabound | Zorc Necrophades
Rare Hunters
Arkana | Strings | Seeker | Lumis and Umbra
Big Five
Gansley | Crump | Johnson | Nesbitt | Lector

Television Only
Yu-Gi-Oh! Duel Monsters
Noah Kaiba | Zigfried von Schroeder | Leon von Shroider | Imitator of Death | Witty Phantom
Dartz | Rafael | Alister | Valon | Gurimo | The Great Leviathan
Yu-Gi-Oh! GX
Vellian Crowler | Jean-Louis Bonaparte | Pierre the Gambler | Zane Truesdale | Society of Light | The Light Brigade | Alien of Light | Wheeler's Doctor | Wheeler | Lorenzo | Howard X Miller | Bob Banter | Battle Footballer | Axel Brodie | Gravekeeper's Chief | Aster Phoenix | Chazz Princeton | Jagger Princeton | Slade Princeton | Lucien Grimley | Grim Reaper | Mr. Stein | Marcel Bonaparte | Martin Empire | Blaze | Frost | Thunder | T-Bone | Dr. Eisenstein | Princess Rose | Prince Ojin | Brron | Zure | Duel Ghouls | Scarr | Goblin Elite Attack Force | Kozaky | Chaos Sorcerer | Mr. Shroud | Trueman | Dark World Army | Mad Dog | Makoto Inotsume | Sartorius Kumar | Sarina Kumar | The D | Light of Destruction | Thelonious Viper | Trapper | Adrian Gecko | Echo | Yubel | Supreme King | Guardian Baou | Skilled Dark Magician & Skilled White Magician | Three Masked Knights | Jinzo | Sacred Beasts | Franz | Mike | Yusuke Fujiwara | Sky Scout | Skull Knight
Shadow Riders
Kagemaru | Nightshroud | Camula | Tania | Don Zaloog and The Dark Scorpions | Abidos the Third | Titan | Amnael
Yu-Gi-Oh! 5D's
Rex Goodwin | Roman Goodwin | King of the Netherworld | Kalin Kessler | Devack | Greiger | Sayer | Professor Frank | Mr. Armstrong | Z-one | Don Piero | Lester, Primo, and Jakob | Lazar | Aporia | Rudolph Heitmann | Carly Carmine | Misty Tredwell | Lawton | Barbara | Malcolm | Radley | Earthbound Immortals
Dark Signers
Rex Goodwin | Roman Goodwin | Devack | Greiger | Kalin Kessler | Misty Tredwell | Carly Carmine
Z-one | Aporia (Lester, Primo, & Jakob) | Paradox | Antinomy
Yu-Gi-Oh! Zexal
Don Thousand | Dr. Faker | Mr. Heartland | Number 96 | Quattro | Nistro | Vetrix | Triad of Terror (Wolfsbane, Coyote, Jackal) | Scorch | Chills | Parker | Quinton | Trey | Erazor | Chironex | Scritch
Seven Barian Emperors
Vector | Reginald Kastle/Nash | Rio Kastle/Marin | Alito | Mizar | Dumon | Girag
Yu-Gi-Oh! Arc-V
Leo Akaba | The Doktor | Barrett | Silvio Sawatari | Yuri | Jean-Michel Roget | Sergey Volkov | Lucas Swank | Z-ARC
Yu-Gi-Oh! Vrains
Varis | Specter | Dr. Kogami | Faust | Baira | Dr. Genome | Pandor | Queen | Shepherd | Bohman | Harlin | Lightning | Windy | Roboppy | Ai
The Knights of Hanoi
Varis | Specter | Dr. Kogami | Faust | Baira | Dr. Genome | Pandor
Aileen Rao | Kekeru Goyu | Tetsu Trudge

Anubis | Paradox | Diva

Manga Only
Mr. Karita | Yako Tenma | Mr. Clown | Ahmet | Tragoedia | Luna | Leo

Card Games
The Lswarm | The Construct | Tierra | Trishula, Dragon of the Ice Barrier

Video Games
Scott Irvine