I supposed now that I think about it, the member could be of Grandpa P saving is son, Pedro's father, from the incident. Could also explain some added resentment towards the relationship between Grandpa P and Pedro's father. And there seems to be some PTSD at the sight of the Hinterland cheese they got from the nun. Though I'd lean towards it being Pedro possible having a direct connection there since he spoke in a voice that wasn't his then spoke in a voice that was his.