The appearance and outfit of this character is my original design, but the character himself is based on J.R.R Tolkien's fiction series, including the Silmarillion.
In Silmarillion, Aulë governs the substances of the Ambarand he delights in all works and crafts all of which he is master, from small works of skin to the forging of all lands and mountains and basins of the sea. He made the rocks, the gems and all minerals. He enjoyed his skill of devising and making new things, and being praised.