Dr. Faker

Dr. Faker is a major antagonist who instructs Kaito Tenjo into collecting the "Number" cards.

Anime
Dr. Faker first appears to Mr. Heartland in order to check up on how Kaito Tenjo's collection of the "Number" cards is going along. He bares a 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 Haruto 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, comparing it to how Kaito gave up his humanity to protect Haruto.

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 gathers the energy of the "Numbers".