Cold, calculating, and frighteningly clever, Declan is a super-elite duelist who was one of the youngest duelists ever to qualify for the pro league! He’s also the president of Leo Corporation – the cutting-edge gaming company responsible for the creation of Action Duels. Declan mastered all forms of summoning – that is until Yuya discovers the never-before-seen Pendulum Summoning! Now Declan will do anything to learn Pendulum Summoning because whenever Declan sets his sights on something, he never walks away empty-handed!