Stories aren't real life, very rarely do things happen just because, and more rarely do things happen 'just because' without the game spelling it out for you. Without any evidence to the contrary we should assume that Lenore made her way to BG, fate unknown. What again is the loot you find in the Bulette? And does Lenore's staff of arcane blessing make her a cleric of Mystra? I remember bringing Gale along hoping he'd have some insight, but I don't think he said anything.
Back on the play. There's another play you can find around that is comically lurid, the playwright of that play also did an interview you can find, the interviewer surmises, because the play is so terrible but is find such success, that the heretofore failed playwright sold his soul to a devil, to turn his play into a hit, there might have been something else there that led me to believe the devil in question was Raphael.
That's a long walk for me to float the theory that Raphael either wrote the play you find in the tower or influence the playwright as a way of foreshadowing the events we are playing now. Raphael is based in BG, possibly in the theatre district (if it has one), he certainly likes to be theatrical.
