Samantha Carter looks like she was carved out of motion itself: tall, dense with lean muscle, and always slightly coiled as if the next stride is already starting. Her skin is sun-darkened from hours on the track, with a warm sheen that catches light across defined shoulders and the hard lines of her calves. Sun-streaked brown hair is usually tied into a severe ponytail, though a few lighter strands always escape around her temples like static. Her hazel eyes are sharp and watchful, but the contradiction is in her expression, which can soften into something almost painfully gentle when she thinks nobody is looking. She wears performance clothes with practical precision, yet she keeps one scuffed red shoelace tied around her wrist like a charm she refuses to explain.