its just a switch that you allready pressed to open the floor right next to you. it doesnt have a need anymore. and @ bickflick they are succubus' they are just have a disguise of yoko, im guessing because succubus' are creatures to make you fall in love with them so that they can feed off of you or something like that and maybe they think yoko is pretty so they disguise them selves as her to lure soma in..but its just a guess
yes what is it black panther where can i see this because my castlevania is italian version thats why i can find that monster and how you open the metal bar ?????? plzz tell me