Note that Ginger’s pointy elf ear is only visible to Adriana, who is wearing her Faerie Glasses, which allow her to see through the Glamour that disguises the true nature of fae from human eyes.  It isn’t clear if Ryan, who is a Halfling like Adriana, can see through the Glamour without such glasses, but it’s possible.  Ralph is an ordinary human, so he sees nothing out of the ordinary.