Dracula's Brides. It is unknown if sunlight affects them as Dracula is show being able to withstand sunlight just fine with no ill affects. Though the women are mostly either within the castle or seen during the night. They seems to be able to appear seamlessly within object such as the bed during Harker's stay in their room as well as appearing unnoticed.
According to Vincent Price, when he and Peter Lorre went to view Bela Lugosi's body at Lugosi's funeral, Lorre, upon seeing Lugosi dressed in his famous Dracula cape, quipped, "Do you think we should drive a stake through his heart just in case?"