YMMV / Goodbye, Eri

• Alternative Character Interpretation:
  • With just how little the story distinguishes between what's just part of Yuta's movie and what's happening in real life, Eri's actual nature is left very ambiguous. Besides it being unknown if she's really a vampire, it's not clear if she did genuinely care about Yuta or if she was just as selfish and abusive as his mother was. Eri's friend later says that the Eri depicted in the film is far more idealized, which Yuta agrees with, but both seem to be happy that her positive qualities were immortalized, which is a far cry from how Yuta's father felt about his wife's push for the same with her own documentary.
  • It's worth noting that Yuta doesn't sabotage Eri's movie like he did his mother's. Considering his mom and Eri's similarities, it begs the question of whether this is because Yuta and Eri's relationship was leagues better than him and his mother or if Yuta was so enamored with Eri that he allowed himself to be abused and played Eri's movie straight regardless of the truth. And taking into account the ambiguity of Eri's true nature, is the movie Yuta Loving a Shadow, with the "vampire Eri" that shows up at the end being an extension of this, or was Yuta telling the truth to Eri's friend?
• Epileptic Trees: There's a significant group of people who theorized that rather than parts of the movie being a movie, the whole one shot is the movie, with various characters playing multiple roles. Popular points to this theory include physical similarities between certain people (e.g. Eri to the girl who criticized Yuta's first film, Yuta's dad to the older Yuta in the finale) and the fact that the entire manga is drawn as if it's being recorded.
• Signature Scene: The Book Ends scenes of Yuta exiting a building while it explodes behind him is easily the most iconic part of the one-shot, with it being directly homaged in the opening chapter of Part 2 of Chainsaw Man and the opening to the anime.