She had stars in her eyes and flowers in her hair. She was a summer breeze - a warm caress in the hazy golden fields surrounded with the life that was her. She was a playful sprite, a mirthful entity, a fairy that teased and dangled her toes in stray pools of water and caught tadpoles and dragonflies in the little pond in the forest that nobody ever visited. Her face contained an uncountable number of constellations, from the golden speckles in her blue-green eyes to the freckles that dotted their way across her nose and dusted her cheeks. She was an open book, the sixth page of a novel just started but still undeniably magnetic. She was the cool, clear brook that bubbled under the shade of the old willow tree on the hottest day of the year - refreshing and different from everyone else. The auburn of her hair was the setting of the fiery summer sun, and the snowy white a stray element of mystery. A faint connection to her cold, hard sister.
Her sister was different. The opposite, really. Her eyes contained the fragile light of a million shattered galaxies, and her countenance was a winter pond. Her skin was a thin mask of ice, hiding inky-black waters that unwillingly consumed those that came too close. She was pale and seemingly lifeless, as if she were a lost, frozen soul caught in one of those January snowstorms. A closed book, bound in leather and iron, with only a single golden key hidden in the very back of a dusty closet on the third floor of an abandoned house. She was the lonely lantern that shattered as winter fell, and while snowfall dampened her sharp edges, it could never hide them completely and the shards still cut into the feet of anyone with enough resolve to step outside into the snow if only just to play. She was crystalline, made hard from years of pressure, but still painfully beautiful in the cold, shattered way only the lonely could be. She was blessed to have a sunlit summer to her frozen winter.
Together, the two sisters were summer and winter. Night and day. They were as different as two sisters could be, yet somehow the same. A paradox. Their stubbornness to change, the way winter tried to cling on to March and summer dragged its way into autumn. The light that came from within - one lighting up the entire world and everything she touched and the other bringing an almost unsettling warmth to the ones nearest to her. Together, the two sisters were the new life and blossoms of spring and the heavy rains and falling leaves of autumn. They were the gray in a world of black and white, but at the same time they were somehow the black and white in a world of gray. More than that, they completed each other. The last piece in a jigsaw puzzle that you thought you lost and sprinkles on cupcakes and brilliant colours after heavy rains and ice in lemonade. Their raw beauty was a crystal sunflower - cold and beautiful and bright and fragile and happy all at the same time, and just a little bit sad.
She was summer and her sister was winter, but without the other, they would be neither.
A/N: I adore Frozen, and the relationship between Anna and Elsa was beautiful and broke my heart.