A long, long time ago, before people and their cities filled the earth, even before many things even had a name, there was a mysterious place that was guarded by the fairy of the lake. Fair and generous, each of her followers were ever willing to serve her. There was a time in which some evil beings threatened the lake and its surrounding forests, and the fairy's followers joined her on a dangerous journey across rivers, swamps and deserts in search of the crystal stone, their only hope of being saved. The fairy warned them of the dangers and difficulties that lay ahead, of how hard it would be to endure the whole journey, but none of her followers were afraid. They all promised to accompany her to wherever it was needed, and that same day the fairy and her fifty most loyal followers set out on their journey. As it turned out, the voyage was even harder and more terrible than the fairy had imagined and warned them about. They were met by terrifying beasts. They had to march day and night, lost in deserts, hungry and thirsty. Faced by such adversity, many followers lost heart and abandoned the quest. Finally, only one remained, and his name was shadow. Shadow was by no means the bravest, he was not the best fighter, nor was he the most quick-witted or the most fun. However, what he did do was stay loyal to the fairy, right to the very end. Whenever the fairy asked shadow why he had not done as the others and simply abandoned her, shadow would always say, 'I told you I would follow you in spite of all difficulties, and that is what I am doing. I am not going to turn my back on you just because the journey has been hard. 'thanks to her loyal shadow, the fairy finally managed to find the crystal stone. Unfortunately, there was a monster guarding the stone, and this monster was not about to give up the stone easily. At this, shadow, in a final act of loyalty, offered himself in exchange for the stone. The monster accepted, and so shadow spent the rest of his days in the monster's service. The powerful magic of the crystal stone meant that the fairy could return to the lake and make the evil beings disappear. But every night she would cry at the absence of her loyal shadow, because from shadow's act of self-sacrifice had arisen a love stronger than any other. And in memory of shadow, and to show everyone the value of loyalty and commitment, the fairy presented every being on earth with its own shadow during the day; but when nighttime comes all these shadows travel to the lake, to spend time with the sad fairy, and to try to console her for her loss. 
The fundamental basis of friendship and love is to remain loyal and committed during times of adversity. 