Marick Tyris is the former leader of Arcona’s Shadicar, an elite cadre of assassins formed within the ranks of the Shadow Clan. Beyond the cloaks and daggers, however, Marick's true talent lies in his eerily preternatural attention to detail. Always alert to potential threats, Marick reflexively commits any room he enters to memory by noting every corner, shadow, and exit. He instinctively analyzes anyone that enters his sphere of awareness, breaking down their posture, attire, armaments and any other quirks, tics or tells. This allows him to mechanically pin-point weakness or flaws in targets and gives him an edge in single or small-encounters with enemies. It becomes less effective when his attention is stretched too thin over a larger battlefield. While his uncanny Perception is useful for investigation, Marick lacks the heart for unraveling complex schemes or mysteries and instead focuses on being able to digest and then adapt to the things he perceives.

Knowledge is power, and power can do wonderful, terrible things to even the strongest of minds. While Marick Arconae wears his willpower like a suit of armor, the weight of his experience and the knowledge it carries has begun to form hairline fissures in his mind of iron. These “cracks” manifest themselves into small quirks such as his obsessive-compulsive desire for balance and order. Symmetry and organization, specifically, have become very important to him, whether it’s adjusting a misaligned painting on a wall or making sure that his bag is packed neatly. This has made it easier for certain friends to push Marick's buttons, and he can easily become overly critical of not just his surroundings, but his comrades. This can often lead to unintentional irritation. He also tends to avoid windows or standing with his back to doors, leading others to question his line between awareness and paranoia.

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.

Through a combination of ruthless training and battlefield experience, Marick learned early on that emotions cloud judgment. This lead him to develop a method of using his beskar-like Resolve to fall into an altered state of mind he calls 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 situations better than others and gives him an edge when making split-second decisions. Marick has relied on Deadheart so heavily, however, that he has difficulty turning it off. Though often bound by this cold, detached mask, signs of soul-deep weariness slip through the cracks as he struggles with his own broken humanity to maintain the few relationships he has with the people he cares for.

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.

While Marick is a lethaly efficient weapon in close quarters combat, he knows that he is far from the best. He will use his Subterfuge to blend in and hide his intentions while waiting for the right, precise moments to strike. He will not hesitate to employ his expertise with Poisons and Toxins and is skilled at creating his own concoctions for a wide range of purposes. He holds no illusion of defeating superior saber duelist in a straight fight and instead prefers to rely on knowledge and cunning. This has lead people to start calling him "The Gray Fang” for his ability to discreetly — or openly — take down even the most prolific adversaries, often without having to draw his lightsaber. This reputation acts as a double-edged sword, as even those who consider him an ally can never know which mask the Grand Inquisitor is wearing.