While Locke grew up on a farm and served the Galactic Alliance in a time when battle skills and survival were more important than rigorous formality. he often puts on a professional exterior, especially when dealing with business or military matters. However, sometimes Locke gets tired of being so formal, and will act more relaxed, unprofessional and true to his roots. Locke is fully aware that this is often frowned upon by others, but at times he cannot help himself, and occasionally even finds satisfaction in making those who appreciate formality uncomfortable. While in the company of those he knows well, Locke almost always drops the professional demeanor, as he personally hates it.

Locke values life and is generally a kind individual, especially to his own allies and neutral strangers. On the other hand, he looks at the world with an analytical mind, and will not hesitate to use every resource around him, whether living or not. In addition, he rarely shows mercy to enemies unless the situation requires it.

Locke has a strong sense of duty. He takes any role or job he is given within the Brotherhood very seriously, as he has with every military posting throughout his life. Despite this, his perception of what his duty is and what he has been told to do are sometimes different things. He will not hesitate to disobey orders or deviate from a path chosen by others if he feels it is the most responsible thing to do. As such, sometimes Locke takes the right course of action, and other times he can be stubborn and counter-productive.

Locke strongly believes that the Brotherhood must stand united in the face of exterior threats. While he has his personal differences, his own enemies and rivals, and is capable of seeking the destruction of an entire Clan, he generally believes that the Brotherhood must stand as one whole and will often put aside his differences with those of other Clans to bring about what he perceives as the greater good. In combat, however, he will abandon this view. Everything changes once a battle has begun.

After a lifetime of battle, Locke's emotions have hardened to the point where he is numb to the suffering and horrors of war. His use of the Force has further enhanced this, and Locke has embraced it. During intense battles, he willing isolates himself from all emotion, becoming one with his weapon and the Force. This oneness does not come without a price, for it results in Locke becoming cold and distant.

Years of combat against the One Sith have improved Locke's focus in close-quarters combat to the point where he is highly effective in close-range fighting, even against multiple opponents. However, due to this increased focus on close combat, Locke has trouble tracking multiple enemies at long range.