She, as Hamel's sister, looks like she may be capable of magical music, as can be seen from one of the episodes where she plays on her Sythe, but it's a bit unclear. An ancient pipe instrument, also referred to as a mouth organ or Pan-pipes. He's the King of Dal Segno, father of Trombone. Their country is a warrior country, there to serve and protect Sforzando. He's one of the guardians who is protecting the city of Sforzando.
Trombone is the prince of Dal Segno.
He is a warrior at heart, yet he still lacks actual experience. He seems to gain this throughout the show, though. He's the husband of Adagio. He's part of the band of traveling performers. He's the strong man.