(blue eyes) pair well with cool red tones .
: Consider the significance of the physical attributes mentioned. Red hair and a tight ass are specific physical characteristics that might be highlighted for various reasons, such as to convey personality, to adhere to certain beauty standards, or to draw attention.
: The author uses this description to set Ruby apart from other characters and to subtly suggest her background and habits. The execution is done tastefully, avoiding objectification and instead integrating it into her character development.