Origin story
Karthyayani is the form of Durga born to the sage Katyayana, invoked in the Devi Mahatmya as the slayer of the buffalo demon Mahisha. She is the sixth of the Navadurgas and is worshipped on the sixth day of Navaratri.
In Kerala she is honoured as a gracious mother at Cherthala and in the kavus of central Travancore, where her annual festival draws devotees seeking relief from illness and hardship. The lamp, the mirror and the golden ornaments express auspiciousness, and her worship is associated with the family, the harvest and the wellbeing of women and children.
Source: Wikipedia: Katyayani — https://en.wikipedia.org/wiki/Katyayani
