Aggie was kind Penn said that it made her weak and maybe it did, but compassion is something that ought to be admired. Aggie thought that the sirens had experienced more than their share of time on this earth, but all of that came with a cost and Aggie thought they'd caused far more than their fair share of death. She said that they had enough blood on their hands and it was time for them to go. Aggie proposed that they stop eating and go into the sea and swim together until their bodies gave up and they died so Penn killed her.