I agree - it's pretty clear he obviously was hesitating over taking credit for bringing Jake to life and accepting Jake's praise for resurrecting him when he didn't actually do so. Maybe Oliver Sato was being sarcastic/joking?

I understand your hesitation about Giffany, but since she is a two-dimensional character of a dating sim, I saw her more of a demonstration of how shallow and empty such characters are compared to real-life people. She's not meant to be more than an one-dimensional villain, hence her single-minded desire in being…