Fyodor is Dazai's chess partner since elementary. Other's point of view sees them as mortal rivals or more than that. But The two of them are in good terms. They secretly play chess for fun or practicing. Fyodor likes being on Dazai's presence as he knows what Dazai is planning and can figure out easily if he's going to do something bad or unexpected. Fyodor has a slim figure and is quite tall, he has dark purple sharp eyes and has a black hair that is shoulder length.