Kwan Yin is the Chinese goddess of Mercy and Compassion. She is known by many names across East Asia, including Kwannon in Japan and Guan-eum in Korea.
She represents unconditional love and acceptance. She is usually depicted as a woman, wearing flowing robes with a delicate hood that covers her head but does not obscure her face. She carries in one of her hands a jar or vase containing dew which she uses to help relieve pain and suffering.
She is a patron of children, mothers, parents, the needy, the sick, the troubled, the suffering, and acts as a guide to the lost.
She is also considered a fertility goddess, as well as a symbol of good luck, good fortune and good health.
I keep a statue (the one above) of Kwan Yin on my altar, with a peacock feather, which is also considered to be sacred to her.