I am told that "persona' originally meant "mask" - as in an actor's mask. I'm not sure if that helps, but it strikes me as encouraging a kind of modalist monarchianism. But it's not strictly and archaically speaking a "human" type attribute.
Out here is where I usually begin to get dizzy.
"Out here is where I usually begin to get dizzy."
With good reason!
"You ask what is the procession of the Holy Spirit? Do you tell me first what is the unbegottenness of the Father, and I will then explain to you the physiology of the generation of the Son, and the procession of the Spirit, and we shall both of us be stricken with madness for prying into the mystery of God." +Gregory the Theologian
I remember one winter evening getting into a deep conversation about the Trinity with a holy abbess at her monastery on a mountain outside the village in Greece. It was dark night and the wind seemed to moan outside the walls. At one point she announced, "We have gone too far!" I asked what she meant. She called my attention to the wind and said, "The demons are beginning to howl."