I decided to make Koda’s Warmth, thinking the effect was fixed long ago. But when I equipped it, I had to realise it was never fixed, even though the devs were talking about a fix after Bitterfrost Frontier had been released. My problem is the exact same this post from 8 months ago discussed: https://forum-en.gw2archive.eu/forum/game/lwd/Kodan-s-Warmth-not-visible-on-charrs-at-all
Basically, as I know, the aura was intended to be the same as the one the Braziers of Koda apply on players, but it seems hardly visible right now. I’d love to see it fixed, and I’m pretty sure there are others who think the same, too.