Much of Kir's personality has been shaped by having served for so long as Consul, Dark Councilor, and Justicar. He is extremely protective of his Clan and the Brotherhood, and can bring down ruthless wrath upon those who threaten either. His actions are calculated and fair, and he will stand against injustice as he sees it. However, his time at the higher levels has made him somewhat disconnected from the lower echelons of the Brotherhood, which can occasionally appear as indifference.

Formerly a downtrodden youth, Kir came into his own in the Imperial Stormtrooper Core, eventually adopting a strong-willed leadership style which earned the trust and respect of his subordinates. A veteran of numerous conflicts, he is the epitome of the cool and collected professional soldier - his experiences across the galaxy have hardened him and he rarely shows his true emotions outwardly. In his day-to-day, Kir's demeanor is respectfully formal yet relaxed, and is known to make the occasional joke. His formality can be seen as aloofness by some, especially subordinates.

While generally laid back and more than happy to offer a quip of sarcasm, Kir Taldrya Katarn's entire demeanor changes once combat begins. He becomes focused and quiet, with his smile replaced with a look of grim determination.

Kir's movement in battle is precisely honed and efficient. He is not given to extravagant demonstrations of power or grand showy gestures. His movements are studied, practiced, economical, and deadly. Outwardly this style is not intimidating, and opponents will typically not flee in the face of it.

Kir has spent years in leadership positions, honing his strategic abilities. A practiced war planner, he has lead Clans, Orders, and entire portions of the Brotherhood into battle. He tends toward the defensive, with occasional quick strikes toward weak enemy positions. This caution can cause him to miss opportunities which would be taken advantage of by a more aggressive commander.