Akuma is muscular and tan-skinned with red hair tied in a small top knot, sharp pointed teeth and crimson eyes. He wears prayer beads around his neck, and the "heaven" (天, ten) kanji is typically seen on the back of his outfits. This kanji is featured frequently in Akuma's appearance, most often at the end of a Raging Demon attack, where it burns itself onto the back of his gi top.
Player 1 outfit:
Akuma wears a dark gray karate gi, similar in style to those worn by both Ryu and Ken. He either wears brown training gauntlets or wraps his hands with white rope, brown sandals and wears his deceased master Goutetsu's prayer beads around his neck, with a black "heaven" (天, ten) kanji visible on the center bead.
Akuma's Swap Costume is Heihachi's Player 1 outfit from Tekken 4, which is a white modified fundoshi along with both the hand and foot wraps and the rope from his primary outfit. Akuma's hair also gains extra white spikes on each sides of his head.
This outfit later became one of his customizations in Tekken 7: Fated Retribution.
Akuma wears his primary outfit and gains dark brown genji armor and greaves, decorated with two red lines running down each side, to cover his karate gi. He also has two flags decorated with demonic symbols on each side. He also wears a black half-mask to cover his mouth and white and red wristbands with a brown trim to match his outfit. He no longer wear sandals, instead fighting barefoot while wearing this outfit.
Player 1 outfit:
(See Street Fighter X Tekken Player 1 outfit)
Player 2 outfit:
A palette swap of his Player 1 outfit, Akuma's gi is now scarlet red and the wraps around his hands are now brown instead of white.
- His customizations are the same as the other male characters, but he can also be customized with muscle shirts as part of his casual attire, a god warrior and one of his disguised forms in Pocket Fighter in different colors and designs, which is his Japanese Fortune teller attire. He can also be customized to wear his Swap Costume from Street Fighter X Tekken, which is a white modified fundoshi as originally worn by Heihachi in Tekken 4, but without the foot wraps and the white pointed streaks on his head.
All of Akuma's outfits remain the same, with his gi, prayer beads and the ropes on his hands and waist changing colors between the 1 to 4-Star appearances. The color palette changes are a reference to his main appearances in the Street Fighter series, where the characters outfits remain the same, with only the outfit color chosen by the player.
Player 1 outfit:
His gi becomes a faded dark blue like in his crossover appearances, such as both Street Fighter X Tekken and SNK vs. Capcom: SVC Chaos. (2-Star)
- His gi is now white and the ropes on his hands and his waist are burgundy red, while the prayer beads are black. (1-Star)
- His gi is dark red and the ropes on both his hands and waist are black, while his prayer beads are dark brown. His hair is white resembling his Shin form in Street Fighter III: 3rd Strike. (3-Star)
- His gi is now purple, while his hair becomes golden blond. The other aspects of his regular outfit are unchanged; his prayer beads are still dark brown and the ropes on his hands and waist remain black. (4-Star)