I'm so glad to see that best girl Nina landed on her feet and is happy. She's out there living her best life, and hasn't forgotten what Irushia did for her. It's still a shame that she had to be separated from him, due to the curse. I really thought Rabbit Ball would have stayed with him, because he has curse resistance and because we haven't gotten to see what it will evolve into yet. I'm betting that it'll turn into a bunny girl in the future. A really cute and sexy bunny girl . . . that can also open it's much larger 2nd mouth in its stomach and eat people and monsters.
I hate to say it, but it's probably better that people continue believing that Irushia is an evil dragon. If people knew how good he was, there's a danger of people trying to approach him. As long as he has those passive curse scales, people need to stay away from him. I hope that if he can ever get rid of them, Adolf and Nina will then write a book to clear his name.
I'm curious if the Saint will be evil too. I'm going to bet that she's actually good. It would be weird if both the Hero (now dead) and the Saint are both evil.