Fintan O'Sullivan was born into a poor Irish working class family His father was Irish and his mother was Chernarussian. He was born in Monaghan town and was educated in a public school. His family didn't have much money so Fintan was not able to enjoy the luxuries that others had enjoyed. He made trips to Chernarus to visit the relatives over there. He lived on the boarder in the Republic of Ireland and there was frequent bombings from the UVF (Ulster Volunteer force) including one notable time when a car bomb exploded in Monaghan town which killed 33 people. There was a major sectarian divide. When Fintan went to secondary school he learned about new ideologies and developed leftist views that weren't visible to many people.
Fintan's father was a truck driver and was part of a union called Federation of Rural Workers. Fintan's mother was a house wife but became a waitress because of the lack of income. Unfortunately his father became and alcoholic and became very ill. Fintans' father became a very violent man and his relationship with his son deteriorated. Fintan's father passed away from the illness. This put major strains on the family. His mother became depressed. These experiences made his leftist views more visible.
Fintan worked in a shop and the pay was bad but he could live on it. He began to look on to Chernarus and he saw how the Chernarussian socialist party shaped Charnarus to make it a better place. Each trip made him want to move over there more. He just really wanted to escape his old life. In 2011 him and his mother moved over to Chernarus. He worked in a factory that manufactured metal. He lived in a bungalow house in Chernogorsk, he met a man named Kirill Yefimovich Vinogradov and he became his friend. He didn't follow Kirills religion because he was an atheist. Fintan was happy in his new country. He was also on his way to getting citizenship but the pandemic happened and he was unable to get it. One day he showed up for work and was told not to go because of the situation. Fintan is now looking for his friends and is also looking for like minded individuals.
He met a man named Alek Kotov in Chernogorsk. Alek introduced Fintan to a kid named David Friedrich Breitsprecher and a strange man named Nikita Belov. Fintan stayed in Cherno with them. He supported the RAC because he thought they were doing their best for the place. Fintan noticed that the local people were moving away from Cherno to seek safety up north. He did the same thing but eventually moved back to Cherno. Eventually he became good friends with Alek and his people.
Alek saw that Chernogorsk was being abandoned. He set up the VMSZ (Voluntary Militia of South Zagoria). Fintan became apart of it. Things were going well at the start but then the CLF attacked. The VMSZ captured one of the CLF members. Alek made the decision to hand the CLF member over to the RAC. But it wasn't over. The CLF came back to Cherno, captured Alek and executed him in front of Fintan. The militia fell apart and the remaining members of the VMSZ left Chernogorsk.