My trilogy features an otherworldly monstrosity called Fenrisúlfr as it's primary antagonist, whose characterisation takes cues from Nyarlathotep, Sauron, Showa!King Ghidorah, Sutekh and the Gravemind. It is single-handedly responsible for every bad thing that happens in the series and the actions committed by several antagonists. Fenrisúlfr visits certain people in their dreams, as loved ones or religious deities to persuade them into finding ancient weapons called Divine Tools that form an interdimensional portal allowing Fenrisúlfr to escape from within a black hole, in exchange for granting their deepest desires. Throughout the series, Fenrisúlfr tries to goad the protagonist into gratifying his selfish desires and clinging to his nihilistic worldview, while appearing to him in the form of a monstrous dog.
Towards the end of the trilogy, it's revealed that Fenrisúlfr is responsible for the destruction of countless interstellar civilizations and aims to exterminate humanity out of hatred for organic life, which it likens to a plague that consumes everything in its wake. As such, it believes that the only way that it can prevent the universe's destruction is to eradicate all organic life in the universe. To this end, Fenrisúlfr took it upon itself to manipulate various historical and supposedly mythological figures in order to achieve its end goal of systematically destroying all life, while serving as the inspiration for monsters from various Indo-European and Afro-Asiatic Chaoskampf myths such as Tiamat, Kāliya, Ḫedammu, Leviathan, Apep, Typhon, Yamm, Illuyankas, Vritra, Aži Dahāka, Satan and, as its name suggests, Fenris.
Rather than writing Fenrisúlfr as a villain defined by it's desire to cause death and destruction, I want to portray it as a being that is simply so far beyond human comprehension that our concepts of good and evil cannot be applied to it.
How would I be able to achieve such a feat?