Thank you, yogaflame, that makes perfect sense & has to be right. X-tra for the scans, those were great to see, and they add to things story wise. Think this still applies, though, even retroactively:
For some reason, organ music and villainy seem to go hand in hand. Perhaps this is because of the organ's powerful sound, which has led to it being dubbed "the king of instruments." Perhaps it just sounds sinister* and scary. In any case, if a character has organ music for their Leitmotif, it's a sure sign said character isn't going to be petting any dogs.
Combine this with Ominous Latin Chanting and/or some For Doom the Bell Tolls, and he's got Big Bad written all over him. It can also combine with Dramatic Thunder to make it more dramatic as suggested.
Sometimes this analogy goes so far to show the villain sitting at a big spooky pipe organ, playing ominous tunes, as the heroes walk in on him. This iconic scene was probably inspired by The Phantom of the Opera, whose villain is often similarly shown with his sinister organ. The standard music for this scene is the Toccata and Fugue in D minor by Johann Sebastian Bach. Bonus points, however, if they are playing their own leitmotif. Even better if it contains lots of diminished 7th chords. The organ also tends to be the Signature Instrument of Count Dracula. ...* re. Mad Maddie & maybe even, by eXtension... Bad Benny?
Ooh, "Ominous"... indeed, thanX once again, ya saved me a search!