A fun-loving and energetic boy, Yuya is very theatrical and loves to entertain people, traits he seems to inherited from his father, Yusho Sakaki.
During his Duel with the Sledgehammer, Yuya proved to be quite clever and skilled in Action Duels, having learned everything from his father.
Similar to Yugi Muto, Yuya has a good deal of less self-confidence than the protagonists in the previous series.
After leaving the Xyz Dimension, he wears the Rollerboots that Allen Kozuki gave him.
While Awakened, Yuya's eyes begin to glow a luminous red, while his hair becomes frizzled and sticks up on end.
As such, when he finds himself cornered (for example when "Odd-Eyes Pendulum Dragon" was destroyed in his Duel against Sora Perse), or something happens that breaks his confidence (like when Declan and Sylvio used Pendulum Summoning), he tends to pull his goggles down so nobody can see his eyes.