Kanal O'neill has no home planet, at least not one that he can remember. As a child, Kanal O'neill would spend most of his time on different starships and grew accustomed to the atmosphere and nuances of space and the various crafts that traverse it. As a result, Kanal O'neill feels more comfortable on a ship than on any planet.

Kanal O'neill is devoutly loyal to his House or Clan and will follow orders unquestionably. He would sacrifice his own life to protect his House or Clan from harm. This attitude, however, often clouds his ability to see things from an arbitrary or objective point of view and he can come off as extremely narrow-minded.

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

Kanal O'neill has a military background, and draws upon his experience to tackle the obstacles in his life. This makes him decisive, efficient, and fearless; provides him with a strong sense of duty and strength; which tends to influence his ability to fight and lead. However, a rigid mind is less compassionate towards individuals and less imaginative, and Kanal O'neill sometimes risks appearing callous, relatable, or incapable of compromising.

Sometimes the only way to prepare for the worst is to always expect it. Kanal O'neill takes this philosophy one step further by never leaving home without accounting for every possible scenario he might expect to encounter. Kanal O'neill tends to always have the right tool or item for a situation and has a habit of quietly and almost smugly presenting solutions before anyone even recognizes there is a problem. This foresight is far from infallible, however, and he often finds himself at a loss in situations that go beyond what he could have imagined. While incredibly practical and often a life-saver in a pinch, his perpetually pessimistic outlook on daily life can be a bit draining on more optimistic-inclined companions.

Kanal O'neill is utterly devoted to success in combat, no matter the mission, no matter the cost. He has spent his life building himself in the image of war, utilizing a dogmatic regimen that has lead him to a single-minded obsession with military success and requires intense physical and mental training. This training, however, has come at the cost of anything resembling empathy or concern for others - even his superiors and subordinates.