Responses
I'm pretty sure it's the later. I forget how long it has been since MC was aware she was in Nina's body, but she still thinks of herself as her past life rather than Nina.
Though I don't know if she's doing is intentionally or not, bc she still treats Nina's life like hers. It might just be the author's way of distinguishing when she's thinking/talking about details from her previous life vs. earlier in the current life.
Is nina cage and mc the same person? Like are they present within the same body? Or is the mc just separating herself from the body by calling it "nina"?