First documented Steam Deck player of LSS lol
Looking into it, the sprites were mistakenly left in the gallery from a pre-Pristine Cut version and are impossible to access.
First three are Fang's post-time skip outfits which were replaced by the layeredimages system. They used to be "fang 15b" and "fang pjs", now they're both "fang_15b" and "fang_pjs".
The last one is of Naomi from the old version of "Facing Naomi", it's basically her post-time skip outfit but without the long hair.
Apologies, this is a huge oversight on my end! I will patch these up for the upcoming actual final update.