A little-known doctoral student has emerged as one of the most visible faces of a protest movement in India that has mounted the most serious challenge to Prime Minister Narendra Modi's government in years.

Neha Bora, 29, is one of a number of prominent activists detained this weekend as the authorities cracked down on attempts by protesters led by the "Cockroach" youth movement to demonstrate against what they say is massive vote-rigging to help Modi's party.

But Bora, national president of the left-wing All India Students' Association, says she did not set out to become an activist.

She traces her path into politics to theatre and, later, the student-led protests against a citizenship law in 2019 and 2020.