I have no idea how I've returned to this because I haven't thought of Black Cat in ages but wow I'm glad I did. Still one of the best soundtrack on here.
Still can't find two peices used in this anime: The circus music that played in the first episode during the parade and later when train ate the spicy chocolate. And the high tension music that has a bunch of staticy voices saying "Ai-ai-aiaiaia" or "I-i-i-i-i-i-i or something like that. Pretty sure it was used for pretaghouls scene.
Yes! I have been trying to find that piece of music where Train turns into a boy as well! I think I even heard that music on Bleach a couple of times...
Claire Mitzuki I had a feeling it was a stock track, if you heard it in bleach that might confirm it. and here I was hoping looking through the soundtrack composers other work might lead me to it...