Above all, resentment drives Nil's actions. Hatred is his crutch; it is the one thing he has known for almost a hundred years with no reason to value his criminal existence as the apparent product of adultery. He loathed the only world he knew in the dark cell, and, following his fostering by Navarus, has channeled that negative energy into plotting revenge against the nobles. Nil has dedicated himself to a battle not just for survival, but also for the satisfaction of his anger.
His battles begin with the Sermenys and Navarus, the latter of whom he consistently defies. Thought of as no better than a dog to be tamed, Nil swallows the pain of punishment and never backs down, often choosing to fight on uneven ground. Navarus embodies another bitter betrayal, painting him a prime target. Their wrangle has lent to Nil's roundabout tactics at getting back by dragging in those related to Navarus.
Although aware of Sekreuz's estranged relationship with his father, Nil targets him regardless for being the son of Navarus and an aristocrat. He revels in crushing Sekreuz's self-esteem and furthers his plans by manipulating Carne, the fiancée. After snaking a hand around her heart by posing as a friend, Nil crushes Carne when the opportunity presents itself and brims with glee at the damage. The sweet façade he had adopted in his two-faced scheme ends, revisited by an unrepentant smirk, highlighting the extent of his maleficence.
In spite of his consistent bickering with personal enemies, Nil's bipolarity surfaces best around uninvolved folk such as Lark, at whom he lashes out for seeing his injury. Nil does not like to be seen in a vulnerable state, and thus shuts himself in when he is hurt. When aggravated then, he strikes in a manner reminiscent of a wounded animal by attacking with reckless abandon. Reason is lost as he goes mad with fury.
In his sedate moments, Nil is blunt and dismissive, qualities that Bathory claims are his kindest. He bears no interest in anything or anyone beyond the scope of his revenge quest, being all around unpleasant and boorish, nor does he intend to change the fact.
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