I decided to render him in Cycles and update the post.
Here is my latest character design. A mountainside creature with some kind of bio-luminescence.
This project was also to test Eevee as vis-dev tool and some new features, like the hair strip shape and the new skies nodes, like in the renders below…
For the rocky ground, I used a quick mix of Multires and Displacement modifiers on a simple piece of geometry