One of six parts of the kirin costume, the others are the Kirin Horn, Kirin Ears, Kirin Mane, Kirin Feet (Front Legs), and Kirin Feet (Back Legs). When worn, your original tail will be hidden. It has three colours, the first affects the appearance of the tail, the second affects the appearance of the back cover, and the third affects the appearance of the tail fluff.
What the kirin tail looks like being worn on a creature, as seen from the side.
What the kirin tail looks like being worn on a creature, as seen from the top.