Imaginary Friends

From publisher blurb:

The College of Imaginary Friends is the home of bards who have discovered a way to fulfill their need to entertain even while they’re alone. By talking to themselves! Whether singing a ballad, playing an instrument, or giving an eloquent speech, these bards can manifest perfect visual illusions of themselves to serve as an audience. Bard of this college are regarded as mischievous for their ability to sow chaos and doubt, disorienting both allies and enemies with their beguiling talent.