When you buy RPG Maker MV, Degica provides you with the game engine + additional resources.
All of the 17 upper-body pictures for the SF characters are found into the extra-assets.zip file, do you have it?
Viewing post in RPG Maker MV RTP Shoulder-Up Portraits comments
I have a folder *called* extra assets in my DLC folder, but it has one subfolder containing music and other subfolder containing only the first 8 of those. Nevermind. I looked again and the others are also there. Either they got added back in during one of my occasional file integrity checks or I just misremembered.