Problem solved, what doesn't make sense about it is that it was a Character Theme for Nu, which shouldn't have been the song that plays in Story Select or the Gallery, so that's why I never found it. Crafty Arc System making a Character Theme a BGM for Modes.
The song is Awakening the Chaos incase anyone else wishes to find and listen to it.
Thanks go out to those that tried to help.
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I believe somewhere in Options you're able to listen to any audio track or SE in the game. You might be able to find the title there.