I'm tempted to go with Feanor. I can't make any sense of the clue cryptically, but as far as straight clues go, Feanor was certainly hot-headed. And earth driven too, if you think about his love for things mined and then crafted.
The one style clue makes me think of the Tengwar, which were developed by him, and were written in several styles (the Quenya style which used no vowel letters, just tehtar; and the Sindarin sound which incorporated letters for vowels).
