Riva came to Bombay, India on 30 October 1939. She was Principal of the St. Joseph's College for Women Alleppey, Kerala. From July 1950 to September 1953 Riva served at Canossa High School, Mahim first as a Teacher and then as Principal. In September 1953, Riva was transferred to St. Joseph's Convent, Alleppey, Kerala to start the St. Joseph's College for Women there and take over as its first Principal. This took a good bit of her energy – to supervise the construction and equipment of the College.
Death
She was admitted to St. Elizabeth's Nursing Home for cancer treatment under the supervision of Dr. Arthur D’Sa. She died on 22 January 1956 in Bombay. Within a year in 1954, she fell ill and was sent for a check-up to Mumbai. She was admitted to St. Elizabeth's Nursing Home and was operated upon by D’Sa in September 1954. She seemed to recover and under the doctor's advice returned to Alleppey after a month, on 30 October 1954. She went all out to be of service to the staff, students of the college in particular and the people of Alleppey, with such exquisite charity that those who came in contact with her went away happier for having met or been with her. However, on 6 January 1956, she had to be rushed back to Mumbai because of her illness, which turned out to be cancer. This time it struck her fatally. D’Sa and Valerian Cardinal Gracias visited her. They were touched by her serenity and faith. She had a kind word, a smile, a gesture of concern for those sisters and hospital staff who attended on her and gratitude for all. She died on 22 January 1956. Crowds filed past her body which lay in the Chapel of Canossa Convent, Mahim. Whispers of "She is a Saint" could be heard among the crowd gathered at her funeral. She was buried in the Cemetery of St. Michael's Church, Mahim. A few days after her death, this very Diocesan Bulletin "The Examiner" carried an article based on her illness and death.
Beatification
She was elevated to 'Servant of God' on 13 August 1994 by Simon Cardinal Pimenta. on 28 June 2012 she was declared 'Venerable' by Pope Benedict XVI. Her bones are placed at st. Joseph's Canossian Copnvent, Allepey in Kerala, India. Such was the sanctity of her life that Micheal Arattukulam, the then Bishop of Alleppey, asked that her Cause for Canonisation be introduced. On 13 August 1994 under the direction of Simon Cardinal Pimenta, the Cause was introduced, at St. Michael's Church Mahim.
