In Bastion, Kaelinda had been dismayed that becoming Kyrian meant taking on a new form, even if that form was beautiful to look upon. The waiting Aspiring Souls, at least, had retained recognizable forms; well, the ones from Azeroth had been recognizable; souls from other worlds had appeared as blurry, generically humanoid shapes.
She recalled that she had observed the same phenomenon during her initial, relatively brief, sojourn in the Maw. When she and Jaina and Thrall had liberated souls from the Tremaculum, souls from Azeroth had appeared in their own shapes, whereas souls from other worlds had been featureless ghosts.
Kaelinda wondered if souls from other worlds saw their fellows from their own worlds as recognizable individuals and Azerothian souls as blurs.
In Maldraxxus, the forms of the inhabitants were horrific — how could any soul be satisfied to spend the eternities in such shapes? — and she saw no blur-shaped waiting souls. She wondered how the few individuals whom she recognized from Azeroth whom she had met in Maldraxxus had maintained their own forms. Would a soul from Baron Vyraz’s world see Baron Vyraz in his own form as she saw Baroness Draka in her own form, and see Baroness Draka in the generic female Chosen warrior form as she saw Baron Vyraz in the generic male Chosen warrior form?
In Ardenweald, ordinary souls — those who were not great nature spirits of their worlds, placed into wildseeds to be regenerated and returned — took on the forms of animals, apparently of their own choosing. Yet the Night Fae claimed to see so many races from so many worlds that they didn’t immediately recognize her race or her world origin. When she helped Choofa restore animal forms to his friends, Kaelinda saw their souls in the same blurry forms that she had observed in Bastion. It seemed, therefore, that when ordinary souls originally arrived in Ardenweald, they appeared in their own forms until they chose their animal shapes. If only she could see a newly-arrived soul from Azeroth! And then, somewhat to her surprise, she did. At Hibernal Hollow, she saw Night Elf souls, seemingly come from the burning of Teldrassil*, still in their own forms.
In Revendreth, Kaelinda saw many suffering souls in the same blurry form that she’d seen elsewhere. Occasionally, however, when confronted, some of them transformed into shapes she recognized — Orcs, Hozen, even Arakkoa — which she’d only seen on Outland or Draenor. Curious.
It seemed to be a general property of the Shadowlands that an individual could only see souls from their own world — or maybe worlds they had visited? — in their own shapes, and all other souls would appear in a shape governed by the particular sub-realm of the Shadowlands to which the Arbiter had assigned them.
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From an OOC standpoint, of course this is what the developers are doing. It would be extremely labor-intensive to create hundreds of new character models and dialogue flavor text to explain a little about the dozens of worlds that they are from. It’s still fun, though, to think about an in-character rationalization for the phenomenon, and to ask some of the questions that might arise from trying to figure it out.
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* But how did they get there, instead of being funneled into the Maw? Had they been rescued from the Maw somehow… by Tyrande, perhaps?