Agent K has long platinum blonde hair, dark brown eyes, and lightly tanned skin. Her lips are a peachish color. Her eyelids are a shade or two darker than her skin. Her eyebrows are a very dark brown to a black and are thin. She wears white earrings that look like small white dots or pearls. Her outfit appears to be a solid black suit. It comes down to being a black turtle neck, black figure hugging pants, a black belt, and black slightly high heeled boots. That's her normal attire apart from her enormous array of various disguises. Along with her uniform or what not is a large array of weaponry.
From an outside view it may seem she doesn't care for her kids or husband, but in fact she loves them devotedly, even though she may express it through a recording or videotape. If something is done unfairly, she fixes it very quickly. She is seen to be a terrible cook. Her career as a spy has also made her highly suspicious of anything that is the least bit out-of-place, to the point of paranoia. In the episode "Abra K Dabra!", it is revealed that she has stage fright and that her middle name is Mildred. She also has a habit for thinking all her chores are secret missions. She plays classical violin. K once took karate lessons from the evil Master Pho (Master Foe) to bust his secret evil bank-robbing karate gang. Even though she's just as logical as C.A.R., she seems to favor Dick over him. Even though both Dick and Agent K are the replacement adoptive parents, they still seem to be very much in love and care for Riley and Todd as their own children
- In the episode "London Calling", it is revealed that during her school years at the spy academy, the only class she ever failed was cooking.