This is a ghostly voice, harmonizing. They're like the voices you hear in your head. These voices always come in three, one voice says something  the other 2 has to say something afterwards too in different ghostly pitches only when harmonizing. Voice 1 has a low pitch, Voice 2 has a medium pitch, Voice 3 has a high pitch, all harmonizing. These voices are manipulative and it's like your anxious inner voice.