Six decades as a slave fighting in the pits broke Vestril's mind. Her thoughts and words are fleeting and unpredictable with rare moments of lucidity. She can, generally, tell a friend from a foe; however, she is incapable of maintaining lasting memories of normal events or interactions. On extremely rare occasions, Vestril will form a mental bond with a person - such as Mako Henymory and Braecen Kaeth - that results in her ability to never forget them. She regards these individuals as 'hers and only hers' and will often go out of her way to please or obey them. Her random actions and lack of memories tend to strain interactions with non-bonded individuals even when they are aware of her condition. Because of this, her clanmates are slow to embrace her amongst their inner ranks.

Certain objects in Vestril's possession, such as her lightsaber pike, remind the Sephi - on a subconscious level - of the life she had before her mind was shattered as a slave. When she sees, or holds, these objects, Vestril's mind reverts into a shadow of its former self. In these moments, she gains a more fluid command of language and her mental faculties. During her moments of lucidity, she can just as quickly remember the horrors she endured as repressed memories from her enslavement begin to surface. If she remains in this state for an extended period, her mind descends into psychosis and general insanity as a coping mechanism. Once she no longer sees, or touches, the object, she reverts to her normal self.

As a slave, Vestril had been separated from frequent social interactions for the majority of her adult life. Removed from people for so long, she has become primitive and feral in her mannerisms and interactions. The large majority of her actions are based on her instincts: the ability to anticipate and react. While Vestril has lost the ability to read, she retains the ability to understand spoken language and maintains the ability to speak; though her speech is often deliberately slow and cautiously hesitant - preferring short and simple words.

Happiness was stripped from Vestril as a slave. Her life was reduced to fighting and the carnage it creates. Over a lifetime as a pit-fighter, the power of destroying - to put an end to the existence of something - was fostered within her. It gives her power, satisfaction, and a sense of self-worth to overcome an obstacle and snuff out it's presence. This has created a lack of patience in Vestril; especially when others are deciding on tactical plans or logical decision-making. She acts first and thinks second. Be it people, places, or things... Vestril prefers to go through them instead of around. Quite often, this puts a strain on her ability to work with another or when she is part of a team.

Decades as a slave in the fighting pits has caused Vestril to fight with no thought, or concern, for her own safety. Or even her life. Due to her upbringing, it is second nature for her to melt into the flow of combat. In a moment, she can throw herself at her foes with but one, driving goal: to bring about the end of their life in the quickest manner. Due to her tunnel vision and reckless abandon, she often loses the ability to tell the difference between her enemies and friends - except those she is bonded to - causing her to attack both on sight.

Vestril prefers her lightsaber pike. But when it is not available to her, she will use whatever is within proximity or availability to kill or maim her enemies: rocks, fists, fingers, teeth, feet, and everything else. If Vestril can move it with her body or the Force, she can, and will, try to use it as a weapon regardless of her training or ability to wield it. Unfortunately, this desperate rampage can put her at a disadvantage against others when she uses a weapon or attempts a feat she is not trained for. When in this berserker-state, she employs her tremendous physical prowess, but at the cost of composure, strategy, or trained skill.