I can imagine judging by his nature and inheritance he is not a good guy in a slightest
His shady or smoky scales feel like he was touched by darkness and lost his red tint in some unholy ritual or deed yet his eyes piercing as ever glow with original flame of avarice and deadly rage
And I can guess his glance never promise anything good to those who stand on his way
Wherever the smoke appears the fire is burning
Such a cool powerful and elegant beast

Indeed; in 5E, dragons don't follow the same morality as humanoids, so even a dragon that is considered good aligned, such as Metallics, could be considered evil by humanoid standards. Although he was indeed touched by powerful forces to be made more docile, it always helps to remember he is still considered a red dragon, and one has to wonder, "Where is the magical energy created by death within his forest going if it is not being released back into the world?"

I created the lore for Iorrwel almost three years ago, and you can find it in his journal entry here: https://www.furaffinity.net/journal/10867281/
You can also find his stat blocks on D&D Beyond.

Hmm very interesting creature
There is always more than meets the eye when it comes to such unique creatures
Especially since these echos work almost like filacteriums of liches in some way
Very interesting reading it was abd quite detailed

A very nice Dragon you have obtained for yourself and I look forward to seeing more in the future!