Possible Clues:

• Faire performer
• Medieval entertainer
• Male in street on left is singer
• Troubadour and tenor involved in Merlin's destruction
• Singer once turned tail in church and left
• Musician Mike strangely silent around king
• Musician almost entirely without energy for me in set reel
• Old musician silent, walls of room shaking
• Oldtime entertainer
• The boy Harper has gone fighting