Student or Learner
Instead, she took a deep breath and said, “I fell in love with a vampire. I let her turn me because I bought into?? that whole eternal love spiel. Then The Eye staked her, and I . . . I killed someone because I was starving. Eventually the Council took me in and sent me to Hecate.”
I totally bought into that "Macs are better than ordinary PCs" idea, but now I realise it was just hype!
My cousin totally bought into Scientology - we had to rescue him from the cult after a couple of years and now he's in therapy.