Declan Akaba
The head of Leo Corporation, who takes an interest in Yuya's potential. He is famous as a genius Duelist who earned his pro license at age of 15. He seeks to oppose his father, Leo, forming a special team that consists of strong Duelists called Lancers to fight Duel Academy. Declan has a very serious and stoic demeanor, is very calm and collected in most situations, and only talks when it's necessary. Declan's seemingly apathy of the people who turned into cards and his decision to make Riley a Lancer made Yuya initially thought him as being heartless and only viewing them as disposable pawns, but it's later revealed that Declan actually cares for the well-beings of his friends and others, and would go great lengths to save them. Following Zarc's defeat, taking care of the infant Riley became from absorbing the evil duelist's soul, Declan is the only member of the Standard Dimension based Lancers to retain his memories while orchestrating the Junior ARC League Championship together with Yusho to restore Yuya's memories in hopes that Yuya can save his sister from her self-imposed fate. When Yuya's duels across the dimensions failed to achieve the ideal response from Riley, Declan decides to duel Yuya as the latter's final test to become Professional Duelist, which resulted in his defeat. Declan uses a D/D deck, capable of Fusion, Synchro, and Xyz Summoning, and later develops his own Pendulum Monsters after studying Yuya's actions.