While I’m not sure about the separate colors for her hood and cape, her braid was more of a personal design choice she probably liked. I can’t recall if there was some personal meaning from it or not, but I would say it was just design choice more or less.
As for her pants, it’s intentional. The reason for them I believe allows for more flexible movement and comfort, and to prevent tears or ripping.
Also forgot to mention that her Asymmetrical preference could also be more practical, as it allows more flexible movement and mobility. Shoulder wise at least