Knowledge is power, and power can do wonderful, terrible things to even the strongest of minds. While Marick Arconae’s willpower is like a suit of beskar armor, hairline cracks have formed in his mind of iron. These fissures manifest themselves in small ways. Most notably, Marick has become keenly aware of his own obsessive-compulsive quirks for organization and order. Things like symmetry, balance, and efficiency have become very important to him, whether it’s a misaligned painting on a wall or smooth execution of an operation or plan . This has caused him to become overly critical of not just his surroundings, but his comrades, which can often irritate his subordinates, colleagues, and superiors alike. Furthermore, his compulsion can sometimes be too strong for even his iron-clad willpower to overcome, and he may move to fix a disparity he sees whether it is convenient or not to the situation at hand.

Arcona’s Shadicar are the Shadow Clan’s elite cadre of Assassins, and Marick Arconae is regarded as the best. Marick unconsciously checks every corner, entryway, and exit of any room he enters, assessing the threats they could present. Similarly, he instinctively analyzes and breaks down anyone that enter his sphere of awareness to the smallest detail. He notes how they walk, their posture, and not just what they are wearing on their person but how they wear it. These details allow him to mechanically pin-point weakness or flaws in an opponent. While this gives Marick an edge in single-encounters, it loses its effectiveness when his attention is stretched too thin. As a result, Marick would sooner tackle an enemy leader one-on-one than try and Force his way through a squadron of soldiers.

Through a combination of ruthless training and battlefield experience, Marick learned early on that emotions cloud judgment. This caused him to develop an altered state of mind called Deadheart. In this zen-like mindset, Marick is able to remain calm even when mayhem and chaos is unfolding around him. It allows him to handle high-stress encounters better than others and gives him an edge when making split-second decisions. In his long and tenuous service as a leader, however, Marick has relied on Deadheart so frequently that he has a difficult time turning it off. This leads him to come off as cold, detached and dispassionate, despite the fact that he is using the mindset, in the first place, as a way of better serving those he really cares about protecting and serving.

Marick has always walked the line between right and wrong, dark and light. Caught between apathy and empathy, he chooses the only logical path he sees between them: the one that accomplishes the most and hurts the least. A life of pain and betrayal, coupled by loss, has made him wiser to this cold truth. He sees the world now in a perpetual shade of gray and has learned that the only true things are the choices he makes and the consequences they bring. This cynical pragmatism allows him the clarity to often see through deception or trickery through observation alone. However, his sight also pierces trust and camaraderie, and, like Deadheart, he lacks any true ability to turn it off. Because of this, he keeps even his few loved ones at a distance, his heart walled behind doors of stone and his mind trapped in all its knowing.

Despite having helped lead Arcona to victory in countless skirmishes and wars, the Combat Master of the Brotherhood is fully aware that he is not the best saberist or battlefield warrior in the Brotherhood. Instead, Marick Arconae considers his mind to be his strongest weapon and will use his attention to detail and the art of assassination rather than trying to take his enemies head on. He will not hesitate to deploy his skills with Subterfuge or expertise with Poisons and Toxins as weapons to discreetly or openly take down even the most prolific warriors in the Galaxy. To that end, the Combat Master has also learned the value of leveraging his knowledge of the profiles detailing the prominent members of the Brotherhood alongside his growing reputation as Arcona's "White Fang".

Marick views the Force as a tool, not a crutch. He has spent years honing his body into the perfect weapon: reflexes wired to give him a natural, freakish athleticism. Even out of combat, he moves like quicksilver, never taking two steps when only one is required. Instead of using the Force as a weapon against others, Marick has become adept at not just pushing his body past its normal limits with Amplification, but knowing precisely when to tap into it so as to never burn out or waste energy. Timing is everything. While Marick prefers his various blades or lightsaber, his time undercover inside the Collective made him more proficient with using whatever is around him as a weapon. While this training makes Marick deadly in close quarters — with or without the Force — it leaves him vulnerable against enemies that know to keep their distance from the Gray Fang.