Author of around ten books, Thomas Joseph had been in the literary scene for about 45 years.
The mortal remains have been shifted to Thiruvananthapuram Medical College hospital's mortuary.
She passed away at the Breach Candy Hospital in Mumbai.
He wrote scripts for many hit movies, including Shyama, Nirakkoottu, Nyayavidhi, Rajavinte Makan, Bhoomiyile Rajakkanmar, Aayiram Kannukal, and New Delhi.
KR Gouri Amma had recently stepped down from the state general secretary post of the Janadhipathya Samrakshana Samithi (JSS).
Kunjukuttan was under treatment for COVID-19 at a hospital in Thrissur.
Both of them started out as hardcore revolutionaries and became stalwarts of the communist party before finding themselves out of the party and eventually drifting to the rival camp around the same time.
K R Gouri Amma was affectionately called 'Kunjamma' in Alappuzha's Aroor area. The revolutionary leader from Alappuzha had a softer side that might have come as a surprise to many people.
Pillai took ill while leading the recent election campaign on behalf of his son and sitting MLA K B Ganesh Kumar in Pathanapuram Assembly constituency.
Sorabjee, considered one of India's renowned legal minds, was treated at a private hospital in Delhi.