Dazai tends to be a bit dramatic about things-. He likes to tease people; mostly if it means to get a laugh out of it. He also have a somewhat dark sense humor. Aside from that, dazai is trying to become a good human, even after so many kills he did in his past. He is trying to find a cure for the zombie infection, hoping to safe the humanity with this. Yet, he is also selfish, too selfish to get rid of the fyodor he likes so much, even tho it would be better.