ダン・サリエル

Saliel is a young genius musician who boasts tremendous popularity in Torbas, he does everything from arranging compositions to solo performances. The main instrument he uses in most occasions is the violin. Although Saliel behaves politely and gracefully in public, his true nature is that of an arrogant and selfish man. He only shows this kind of behavior to people close to him and is oblivious to the fact that his behavior is described to be "arrogant". He has a contract with the spirit Momo, whom he treats in a disrespectful manner.

[Translated from Wikipedia in Japanese.]