Who is Dariat from The Neutronium Alchemist Consolidation and what is their importance?

Dariat is one of Rubra's descendants, and as such, is affinity linked to the Rubra personality that operates the Valisk. Dariat is being groomed by Rubra to take over the family business. Unfortunately, Rubra crosses the line when he interferes in Dariat's love life, something that ends with the death of his first love...... Anastasia. After Anastasia's death, Dariat severs all ties and seeks revenge against his ancestor.