Listening to The Dark Blowhole while playing SA made me realize that when Kisume appears, the song kicks into a minitheme for her: a few measures which clearly don't fit into the rest of the song. Different key, different melody, the works. I never noticed before because I was assuming it was just the "kick the music up a notch when the miniboss shows up" thing ZUN always does, but it's not quite the same thing, since so much is different. I'll always think of those two bars as "Kisume's theme." (Actually, I'd like to hear an arrangement or set of variations on that theme, rather than the entire song, to serve as a Kisume boss theme, but I don't think such a thing exists.)
In the same game, Last Remote has a cute little touch where distorted guitars show up when Sanae does, evoking Faith is for the Transient People. The interlude really isn't much like that song, though, and of course Sanae already has her own theme, so she doesn't need to seize this one.
Are there any other songs like that? Do any other midboss characters get their own themes? I know poor Momiji doesn't. Shizuka kind of does in A God That Loves People ~ Romantic Fall, but the midboss theme expands and takes over the whole song, leaving nothing of the original behind. I can't think of any others.
For that matter, which midboss themes in general do people like most?
