Height: 5'7 (centimeters unknown)
Weight: 120 lbs.
Voiced by (Japanese): Koki Uchiyama
Voiced by (English): Hank Matthews (episode 1-22, 37-ongoing), David Reale (episode 23-36)
Spirit Monster: Aura (Power Spiritualization: Darkness)
Abilities/Techniques: X-Blade, Diablo's I: Recreate, Diablo's II: Destroy, Diablo's III:Finish Buster!, Shadow Ball, Dark Aurora, Licambio El Muerte (in Black Master form), Hell's Blast (Black Master form; changed to "Death Crush" in the english version)