Lector was next in line to run Kaiba Corp until Seto Kaiba pay Gozaburo back with a loan to earn the name Kaiba. Lector's role, at Kaiba's command, was to buy 51% of a company, which Kaiba forced its president to buy back at the price Gozaburo demanded by threatening his workers. Lector was angered that Seto never gave him any credit for his help, though Seto later told him that he never came up with any ideas, and only followed Kaiba's orders. After the Big Five helped Kaiba take over Kaiba Corp, Kaiba broke his deal with them, so they helped Maximillion Pegasus take over, until he was defeated by Yugi Muto. Seto fired them, but they trapped him in his virtual world, until he and Yugi destroyed their Five-Headed Dragon, trapping them in the virtual world.