I thought I had made a post about this before but upon looking back at my archive, I apparently didn't. So, uh, my bad. Here's a Google Drive link containing download links for BlazBlue Centralfiction's visual novel portraits+facial expressions, VN story backgrounds, and the in-gameplay character sprites (no VFX sprites though).
In case you didn't want to download EVERY character's in-gameplay sprite all at once, I also separated them by character in folders. I unfortunately, did not do the same for the visual novel portraits due to laziness on my part.
I might rework this Google Drive in the future to compartmentalize things differently. Put all of the individual sprite folders in .zip files rather than have loose .PNGs, remove the massive .ZIP files that contain every character's VN/sprite images, separate the VN portraits images by character and leave them in .ZIPs, etc.
Edit: I have reworked how I compartmentalized the sprites and visual novel portraits. Every character's sprites is in their own .ZIPs instead of folders with loose PNGs and visual novel portraits & facial expressions are kept in character separated .ZIPs in their own dedicated folder.