
This is how Heavenly Fire currently looks like in game : he doesn't look like his little icon would suggest. The armor is in game - at some point it was fixed then the fix got undone.

And this is how Heavenly Fire
should look like with his "correct" armor. (This requires the variant_definition to be edited : removing the existing saddle and adding the "sun_jian_armour" in the mount/armour to the correct slot.)
I'm not sure if there were any other issues with the armour (hence why it wouldn't be used) but that armor is just so cool it's a shame it's not being used...