Aspects: Complete Control or Codependence?

I've been reading through some of the Zoe threads and I've been wondering, where are people getting the idea that all of the Targon champions have their bodies completely controlled/taken over by the Aspect? I've seen this come up a couple times, and it's true for Pantheon since his bio literally tells us that: "The Pantheon Aspect had obliterated his personality, memories and emotions. Atreus’s flesh was nothing but a shell inhabited by the supernatural Aspect of War; his mortal soul had joined those of the ancestors in the celestial afterlife." But I saw a couple people claiming that something similar had happened with Leona, Taric, and Diana (that they lost their bodies to their Aspects/are no longer in control of their thoughts or actions/etc) and I was just wondering if anyone knows where this idea is coming from? I don't remember anything in their bio's or colour stories suggesting that they aren't in control of their selves. And I think it's telling that the only Targon character to receive a name change after ascending the mountain was Atreus.