He is a cruel person who does not care about others' lives as long as he accomplishes his own goals.<br /> <br /> Stated in Episode 6 - Galileo Tesoro, he was the only son of his original mom and dad. They were rich and wealthy people who lived in a big mansion. Roberto was once a very kind person like his family. On his birthday, their family held a feast for the three of them to celebrate. While hearing the outsiders, his father brought food to the hungered people. All that was left was a piece of cake, Roberto decided to cut it into three parts.<br /> One day, something caused the family's mansion to get bombed. Roberto was the only person who had lived. Roberto has a change of personality ever since. Seen in a poor hospital, he was adopted by the chief executive of the world famous "Adonimoon Company".<br /> <br /> (Source: Galilei Donna Wikia)<br /><br />