Nihlus has worked tirelessly to attain the knowledge of Sith architects, sculptors, and engineers of all types to learn the best design and build practices that the dark side has to offer. He has emerged through this struggle with knowledge that drives the Umbaran constantly to modify and upgrade existing items - while pushing for the research and development of new-age Sith technologies.

Vexrii's pursuit of becoming a master of Sith engineering and sculpting within the Brotherhood has further soured and eroded his relationships with those around him. This forces him to conduct much of his work in the shadows and out of the spotlight, which in turn drives him to partially resent the nature of his work.

Some have the belief that the Force is the guiding principle in the galaxy, a power that creates and changes people's destinies based on their standing and actions taken. Nihlus goes against this grain. This Umbaran does not conform to any norms, whether they be social, procedural, technical, or cultural, instead having formed the belief that he alone controls and forges his own destiny.

This freedom allows Nihlus to make choices, moral or otherwise, that others may find hard and not be held back by the notion that the Force does not will him so and therefore he cannot or will fail in his endeavors. Unfortunately, this belief system also forces the Sith to take more risks, sometimes putting himself or others in danger needlessly.

During his time at the Holocron Center and Shadow Academy, Nihlus was exposed to a myriad of Sith knowledge. This led him to form a deep obsession with the teachings of Ancient Sith Magic, Sith Alchemy and Mechu-Deru as a skill to be mastered and learned, although he does not adhere to the Sith ways.

Vexrii's obsession runs particularly deep with imbuing these Ancient Sith powers into technology, and can often be found conducting research or tinkering with technical processes most would find unnatural and unnerving - leading to people to steer clear of this alchemist altogether.

Nihlus' personality can only be described as icy, disciplined, and steel-like in his demeanor and interactions with others. He has built a hardened wall around his softer emotions. Vexrii is incredibly stubborn, believing his solution or answer to be the valid avenue of pursuit; with no room for errors or miscalculations on the part of others. He is ruthless in his tactics, devoid of mercy, and does not laugh.

The Sith is normally quiet, with conversations short and to the point; preferring to leave no room for interpretation of his words. He also has no qualms about using torture to accomplish his goals. These traits have served Nihlus well at protecting his mental state, but have left him known widely as someone downright dangerous to be around - no matter who you are.

Nihlus utilizes his mastery knowledge of the Djem-So lightsaber form in unorthodox ways, utilizing his ambidextrous hands to take full advantage of his lightsaber as his primary form of combat. This Umbaran seeks to dominate and overwhelm his opponent through striking from wide, odd angles and deceptive stances, using his weapon to his advantage and ignoring standardized lightsaber combat sequences.

With the incorporation of the Juyo lightsaber form into his primary fighting style Vexrii's movements have become not only more aggressive and unpredictable, but relentless as well - his mind surrendering to battle . This unpredictability prevents Nihlus Vexrii from knowing where his body may take him, seriously diminishing his ability to form a defensive strategy against a Jedi opponent.

Nihlus Vexrii is unconcerned with collateral damage, rules of engagement, or the politics of the battle. He is coldly detached from those around him - even during times of high stress or combat. He shows little to no external emotion, instead allowing them to boil beneath the skin and fuel his powers.

Vexrii makes use of the Force in creative ways, mixing his abilities with Telekinesis and Mechu-Deru to bend technology to his will or outright destroy it. With no qualms about ending the life of a lesser being who has crossed him, very few enemies are spared Nihus' blade and even fewer allies feel comfortable fighting under him for fear of becoming expendable to this cyborg.