Shaved hair, red skin, red eyes
Armor:
Painting guardian mask
Lord blade robe
Eastern gauntlet
Lord blade waistcloth
Weapons:
Uchigatana
Pyro glove - left off-hand because shishio doesn't have fire on his hand when he's not attacking.
Spells:
Power within - fighting time limit
Great combustion - explosions (no fireball because his explosions are all in close range)
Fire whip - fire cyclone
Chaos fire whip - ultimate fire technique.
Rings:
Bellowing dragoncrest ring - boost pyro
Leo ring - boost counter damage
*Shishio can counter an attack after seeing it once.
Note:
Charcoal resin - fire sword
*suits better than fire uchigatana which produces flame all the time. Shishio can use the sword without the flame.