Giki-Kiki is a statue. Her Ruby is the heart and soul of the island. It protects Kinkow from bad muku and total annihilation.
For the king's coronation, they had to kiss the sacred ruby inside Giki Kiki. There was a sacred sister ruby on the Dark Side similiar to the one from the Giki Kiki statue, which Brady and Boomer collected after destroying the old one. (Return of the Kings)
Every 100 years she turns into a human to judge the Giki Kiki dance off. When she is mad, she turns into a cobra. (Dancing With the Scars)