"As the final Earth Sign of the zodiac, Capricorn embodies the vision to fulfil all of life's ambitions. Their slow and steady ascent on their path is practically guaranteed, and with a focus on icy logic rather than tender emotion, Capricorns will get what they want. These traits link them deeply with the White Walkers of Westeros, a powerful and nigh-unstoppable force as inevitable as death is to the mortal."
"Originally created by the Children of the Forest to fight the First Men, the White Walkers broke free from their masters and became the most feared of creatures. Their connection to the life cycle and death completes the arc of the Earth Signs of Westeros, particularly because their ultimate dominion is likely to never fully be stopped."