Why does the tadpole stay snuggled in my companions brain when they die.
I hovered over their lifeless body just waiting to squish the little devil...but...nothing.
Because your tadpoles have been modified, unlike Edowyn and the others' - the Mysterious Guest & Omeluum tell you so. Or because Tav&team are 'chosen ones' - and we'll discover further along the story that we're all 'special'. I hope it's the first choice instead of the second.
There isn't any indication that our tadpoles have been medled with to be any more 'special' than the ones the absolute cultist's have. Omeluum tells you it's been meddled with, but he's only saying so within the context of a 'normal' tadpole, not compared to the ones the cultists have.
It's implied that the other cultists have similar symptoms-the dream stranger, the powers, etc. The difference is that our characters are *aware* they have been tadpoled. companions will even comment that they don't think the process was 'finished' and that if the ship hadn't crashed, we would have ended up like Minthara, Gut, etc if it had reached Moonrise.
