Olga's parents Anna and Andrew Lesik were Stundists who came to Canada in 1903 with their families from a small town called Tarascha near Kiev, Ukraine. Her mother Anna had been married to her father Andrew about a year by then. She was 18 years-old and he was 25. All of mother’s family migrated with them including: Anna's parents Mowchan, Olga's married aunt Nadia, her husband Vasyl, and their small daughter Christina, and her four unmarried uncles – Mike, Stephen, John, and Peter. They settled in Winnipeg, the adults found jobs and eventually built a fine house where they lived for several years. Later they decided to move to Saskatchewan where they took up farms in the south-west of the province. Anna and Andrew had children: John Lesik, Eva (Lesik) Babiuk, Vera Lesik (Vera Lysenko), Olga (Lesik) Vesey born 1907, Nadya and Peter.
Olga graduated from Normal School and taught in rural Manitoba. Because of poor health, Olga moved to teach in Winnipeg. After a number of years teaching her health gave way and she had to resign her position. Olga decided to move to British Columbia. For a short while she taught in interior BC, and then moved to Vancouver and then to Vancouver Island where she worked as a principal of a four-roomed school. Olga got married and had her daughter Nina in Victoria. Since Olga's husband didn't have a job, they had to move to Vancouver where they stayed first with Olga's sister Vera Lysenko. Their son David was born with the serious heart condition and he died during heart surgery at the age of six. Olga taught Aboriginal children in Bella-Bella, on the Campbell Island. Eventually she returned to Vancouver, and in 1962 they bought a house in North Vancouver.
Olga's brother John Lesik was the first Ukrainian-Canadian in all of Canada to become a dentist, practicing in Alberta and Ontario. Her sister Eva (Lesik) Babiuk raised three children on her own, working at the Hotel Vancouver until retirement. Vera Lesik (pen name Vera Lysenko) worked as a journalist and was one of the first Ukrainian-Canadians writing in English: Men in Sheepskin Coats, Westerly Wild, and Yellow Boots. One sibling (Nadya) died in a street car accident at an early age. The youngest brother, Peter Lesik was a radio operator in the Second World War.
Olga was a member of the Women’s International League for Peace and Freedom, hosting yearly garden parties. She translated stories from Ukrainian and some of these were published in The Flying Ship. Some of her translations were African folk tales and stories from ethnic regions from the former Soviet Union—still unpublished. She studied Russian at night school and with a private teacher. Later on in her life she went to UBC part-time, enrolling in upper grade Slavonic Studies, where she studied Ukrainian, the Russian language, Russian history, art and culture, and translation. She finished fourth year studies at the age of 76, having achieved excellent grades. In her eighties she helped to re-publish her sister Vera Lysenko’s novel Yellow Boots.