I absolutely love how they handle Mamushi's arc since she didn't escape consequence yet made a point to say that she still has people who love and care for her despite her mistake. She makes a hopeful ending without glossing over her choices. The classmates were absolutely hilarious as they began to accept the Son of Satan as their comrade. But what I love the most is the turning point of Yukio and Rin's relationship, the contrasting difference of their views and how they live their lives can either make or break their relationship, with one full of doubts while the other full of belief.