Alder Carnelian is the last heir to House Carnelian. Like the rest of his family along with House Sardius, Alder is afflicted with the Grand Idol's curse, a hereditary magical ailment that incites madness and insanity to those that don't regularly perform human sacrifices in the name of the Grand Idol.
Alder, raised in House Carnelian, was trained from birth to have a disciplined mind and repress emotions. As such, he became coldly logical, seeking the best, most efficient course of action. Even so, he still developed emotional attachments to others such as his half-brother Filbert as well as his comrades in the Militia. Alder, however, struggles to understand these bonds and attachments as he does not consciously understand the concept of friendship.
Skills and abilities
Being raised in House Carnelian, Alder was raised from an early age in the ways of a knight, and thus became proficient in combat and military strategy.
Alder, although he is technically not trained as a mage, derives a series of unique magical abilities from his curse. Classified as dark magic, his abilities are believed to have been derived from Deep Ekati. The curse essentially changed the entire structure of his body to be more like a spirit and less like a human. Thus, he has the ability to teleport short distances by temporarily turning into a cloud of black smoke. In addition, while his natural lifespan was indefinite, he could no longer experience human sensations and feelings leaving only is thoughts. In some ways, Alder was not actually alive, but merely a ghost. However, he could still be injured through physical means although he doesn't feel regular pain. The only pain he actually felt is in his own mind when under a powerful hallucination induced by the Grand Idol.
When the Grand Idol was defeated, Alder stopped receiving hallucinations, and he gradually changed into a flesh and blood human. This meant that he did lose most of his dark magic abilities, but he was finally free from the primary effects of the curse. After marrying Darcy Lynette, he took over as the new king of Arguros.