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

One of Rubra's descendants and thus affinity linked to the Rubra personality that operates the Valisk habitat, Dariat is being groomed by Rubra to take over and revive Rubra's business organization. However, when Rubra's intervention in Dariat's love life results in the death of Anastasia, Dariat's first love, Dariat severs himself from the habitat personality and plots his revenge against his ancestor.