Someone in Arshus Wren’s past was killed and he has vowed to avenge their death. Should the object of his vengeance be discovered, he is likely to to do whatever he can to exact revenge, no matter the cost.

Arshus Wren is a firm believer that the galaxy at large would be better off without the Force, those that command it, and those that follow them, mirroring the views of Liberation Front leader Rath Oligard. After watching the galaxy burn time and time again during his relatively young lifespan, Arshus Wren has devoted himself to eliminating any notion of the Force from the galaxy, starting with agents of the Dark Brotherhood.

The Sith rely on their passions to give them strength. Arshus Wren thinks inwards, only of things that matter to him, and always does what is in his best interests. He feels nothing about hurting others, or exploiting opportunities, and believes himself to be special, and above all others.

Arshus Wren has a legendary and virulent need for vengeance. Once crossed, he will make it his life’s work to ensure that whatever slight was received is repaid tenfold. This need for vengeance can be all-consuming, and can often lead to short-sighted decisions.

Through careful study and dedication to isolated martial-combat, Arshus Wren has turned the act of dueling into an art form. A keen eye and attention to detail allows him the ability to learn their opponent's idiosyncrasies while fighting. Arshus Wren then uses his own skills to capitalize on the opponent's weakness. Because of this calculated approach to isolated duels, Arshus Wren has a harder time taking on multiple opponents at once at higher skill levels.

Arshus Wren wears out his opponents through use of the Force, agility, and evasion. Once he has sufficiently tired his foes through the Force, physical, or mental assault, he quickly tries to find a means of cleanly and swiftly dispatching them - usually resulting in a somewhat risky all-or-nothing attempt at a deathblow.