Yuri Boyka is a legendary prison fighter from Chornya Cholmi maximum security prison in Russia. Boyka's early life is largely a mystery. At some point in his life, he realized he had a God-given talent for martial arts and strived to be "the most complete fighter in the world." He was convicted of three counts of homicide in the first degree and incarcerated in Chornya Cholmi, a maximum security prison in Russia. He is likely a former member of the Bratva based on his dual star tattoos on his shoulders, as he also became proficient with firearms at some point. In Chornya Cholmi, he would be undefeated in 34 fights.