This friend has a supernatural powers that detect sins and lies.
Hwalri is a heavenly bird that looks like a swan and a fox face together. This friend washes away our dirty mind, such as sin, falsehood, and greed. And this friend plays a role in giving us integrity, purity, and cleanliness. If we are pure in heart, we may ride Hwalri as we move from heaven.
This friend is 'the crystal of elegance'.