My theory is that Roma didn't say goodbye to anyone before setting out on his next journey. And because of this, Lucius, who had just made new friends, was devastated. In the end, due to his resentment and anger, he began to look even more demon-like, and outwardly he became gloomy and angry throughout the whole time. Also in this theory, Lucius grew hair, since he does not know how to cut his hair, and because of his evil appearance, no one dared to help him.

But the Prince of Hell is still waiting. And he will wait for the return of a friend and further, until time has exhausted itself