Origin story
Daughter of the mountain king Himavan, Parvati performed severe penance to win Shiva, who had withdrawn into grief after Sati. Their marriage is celebrated as the union of matter and consciousness, and she is the mother of Ganesha and Kartikeya.
Parvati is the gentle face of the divine feminine, but she is also Shakti, the energy without which Shiva is inert. Her presence beside the lord, with the lion and the trident, expresses the inseparability of the two, and Kerala's Bhagavathi worship draws deeply on this understanding.
Source: Wikipedia: Parvati — https://en.wikipedia.org/wiki/Parvati