I think the last one should be her friend according from what she said. She said there were four people she choose, her original goal was to carve the memory onto four souls, there are her friend (I don't know.) , her knight (I guess, Flynn.), the guy shared the same prison with her (Philip) and herself. But then Diana and Richard pushed people off the list, which was her. So I don't know among Philip, Flynn and her friend, which two were the time travelers?