Board Thread:Questions and Answers/@comment-37422009-20181108073749/@comment-38886678-20190323215603

Although I have no idea of Araki ever speaking of this, Doppio does have control of Epitaph while Diavolo has control of both stands. So I think that Epitaph is its own stand alone and is the stand of Doppio. Although in Abbacchio's death scene I think Doppio briefly switches to Diavolo's personality without actually changing, but I could be wrong.