Arno was born to a Chernarussian/Russian Mother and Russian/Finnish Father in Zelenogorsk several years after the collapse of the Soviet Union. He is a twin to the brighter of the two Adal, who was from a young age favored for his superior school skills. Meanwhile, Arno was seen as the more industrious, the perceptive and steadfast one that helped take care of the family after the disaster that was an awful car crash in which his parent's pickup rolled over and killed both.
In his early years, Arno excelled in sports, commonly seen more on the football pitch than in the classroom. This would reflect greatly, with his brother earning an academic scholarship rather early on in life to the University in Novigrad. However, sports didn't carry Arno nearly as far. After he turned sixteen, his brother and his sister were put in a tough situation after loosing their parents. They were t-boned along the North Highway by a drunk driver and they were both killed. Leaving them with hardly any money and lack of direction. Arno took the mantle of responsibility until he came of age to join the CDF military. Which would cement some stability for his sister who in turn was having trouble finding a job.
After completing basic, he applied for advanced recon and marksman training to which he was tested and passed with flying colors, hitting a perfect 50/50 on the marksman course. Shortly after his designation and appointment he was quickly dispatched towards the site around Tisy prior to the outbreak