Oh, damn, it's Lyude.
1. Close to his whole family sides with the evil empire, but he stays true to the good guys.
2. He's ambassador to Diadem, Cloud City.
3. Most of his weapons are trumpets, or have something to do with music (Crescendo, Concerto, etc.)
4. For awhile, everyone's got their eye on him, when everyone's trying to figure who the 'traitor' in the group is.
5. Self-explanatory. ;p