starring:
Undyne https://sfmlab.com/item/2655/
Alphys https://steamcommunity.com/sharedfiles/filedetails/?id=744916268
featuring:
Toriel https://steamcommunity.com/sharedfiles/filedetails/?id=607303223
Human https://steamcommunity.com/sharedfiles/filedetails/?id=571899458
Sans https://steamcommunity.com/sharedfiles/filedetails/?id=686820984
Papyrus https://steamcommunity.com/sharedfiles/filedetails/?id=809966203
Monster Kid https://steamcommunity.com/sharedfiles/filedetails/?id=784805186
Femscout (I don't know which one)
and Adam Kid as "Annoying Brat" https://steamcommunity.com/sharedfiles/filedetails/?id=544724659