The unfortunate but astute reality is that Yuri just doesn’t care. Couldn’t be bothered. Classes are pointless and so are the people within the city. She doesn’t have time for silly antics nor does she have time for socializing. Yuri has zero empathy and is extremely blunt towards others, with the quaintly rare occurrence she’ll open up, but I wouldn’t bet on it. It’s not at all a surprise that she was the leader of the biggest Mafia Girl Group and gained herself the reputation of being an incredibly heartless . She’s vindictive, sadistic and wry. But don’t get in her way and she won’t get in yours. 

"A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing."