Yuri is a very upright person who usually does the right things. He has a lot of pride as a fighter, especially because of his Jigil blood. The Jigil is a fictional ethnicity portrayed as a tribe of fierce warriors who apparently reside in today's Asian Russia (even Genghis Khan feared of them). Yuri is very protective about his sister Nina Chakovsky, and is able to overcome many obstacles to ensure her safety.
Chakovsky is a highly skilled professional boxer and world champion. He was the first person ever who could defeat Baki Hanma. His skill is such that when attacked by several wolves at the same time he was able to defend himself and his sister successfully just by using his barehands.
Surprisingly, Yuri can also use kicks. During Baki's warming up before his fight with Yujiro, Yuri used a low kick against Baki in their sparring match.