Unicorn & Fairies Heart. Symbol of the Unicorn: Its white coloring made it a natural symbol for purity, chastity and virginity. The horn of the unicorn was the weapon of the faithful and of Christ. The mythological unicorn was a symbol of chivalry with qualities befitting his, proud and untamable. The unicorn, like all mythological creatures, has been a reflection of man's hopes and fears, dreams and nightmares, and inner consciousness.