Dr. Faker

Dr. Faker is the main antagonist of Yu-Gi-Oh! ZEXAL who instructs Kaito Tenjo into collecting the "Number" cards.

History
Dr. Faker is said to be the creator of Heartland. He apparently was involved in some tragedy that occurred to Tron and his brothers III, IV and V. They all want revenge against him and are hunting the "Numbers" for that purpose.

At one point, Dr. Faker hired Kazuma Tsukumo to guide him somewhere. He was Kazuma's final customer before his disappearance. He also knew Rokujuro and Haru Tsukumo at one point or another.

Yu-Gi-Oh! ZEXAL
Dr. Faker first appears to Mr. Heartland in order to check up on how kite's collection of the "Number" cards is going along. He bears a strong hatred towards Astral's race. He ordered Mr. Heartland to place all of the trash collected by the obots into the Heartland Tower so that Hart Tenjo could send the rubbish into the Astral World, using them as makeshift bombs. He claimed to have given up his humanity in order to protect the world as well as Kite and Hart, comparing it to how Kite gave up his humanity to protect Hart.

He said he knew that a messenger from Astral World would someday come. The messenger was probably Astral since in his flashback, he was sure that he saw the messenger on a certain day. That day was probably the time when Yuma Tsukumo met Astral.

He cleared Mr. Heartland's plan to gather "Numbers" holders together for Kaito to defeat through the World Duel Carnival. He occupies a room with a machine known as the Sphere Field, which extracts the energy of the "Numbers".

When Kite accused Dr. Faker of hiding the truth about the "Numbers", the latter explained that he needed Hart's strange power to attack the Astral World, and that he fell sick because he used too much of his power. Dr. Faker also refers to Astral as the "original Number".

Dr. Faker reveals to Mr. Heartland that the reason for time stopping in Heartland was that waves from the Astral World and another world were passing through Earth.

His master plan for wanting the "Number" cards is revealed to be using them all to once again open up the gate that leads to the Astral world before Astral recovers his memories, for otherwise Astral will recover his powers and take revenge against him.

Dr. Faker became furious when he learned that Tron stole Hart's power and injured him. Mr. Heartland told him that the people had "strange markings" Dr. Faker then ordered Mr. Heartland to "slice those bastards down" when they come to the WDC finals.