As per title. Managed to get panties from Aina, the Dockmaster, Ramis, Syri and Erra, but Erra's panties are not available for fapping, and also the game only tallies up to 4 panties owned in the General stats.
edit2: ok, just spent quite a while reworking this whole thing so it should be much more consistent. This particular issue came down to fancy apostrophe in the name vs simple apostrophe.
Going back to June, yeah. The practice is to NOT use the fancy in the code at all, apparently, but somebody put it into the one that you were given. But then didn't update any of the checks or the other panties. Likely a search replace mistake.