Siddhidatri Maa is worshiped on the ninth day of Navratri and she is ninth among the Navadurgas. Siddhidatri Mata is worshipped for fulfillment of desires. A person attains siddhi through the worship of the Goddess. Goddess Siddhidatri is worshipped by sadaks for attaining Dharm, Arth, Kam and Moksha.
Siddhidatri Maa sits on the lotus flower. She is four-armed and holds chakra, mace, lotus flower and conch.
This is no a fierce form of Goddess Shakti. She is shows motherly affection. She is worshiped by all those who wish to attain self realization. Therefore sometimes her image is depicted with saints seeking her blessing.
In some images all kinds of people are seen seeking Her blessings including demons. This means she is mother of all does not discriminate among her children.