I think he still sees her as his sister, but there was so little about his reaction to E[Liz]abeth’s situation that it was practically brushed off. I wish it had been a little more detailed.
I think she's the real Elizabeth. The brother said something about she reincarnated to the past. Her "old body" is a physical projection of Elizabeth's power not a separate soul, from my understanding
Sadly he actually asks her what happened to the real Elizabeth so he’s aware. He still cares about her but he is aware that it’s not his real sister. I also wish it was explored more because I don’t understand why he’s just cool with it…
This is just my theory, but I think she is the real Elizabeth. Considering in the first chapter we see a servant who kind of looks like the servant that got stabbed, take baby Liz, from what looks like a fairly expensive cradle. It seems like she was either stolen as part of a scheme or a servant took her after her mother and father were killed in order to save her and hid her away from clearly the crazy ass queen who’s trying to kill off their family I think when she died, she didn’t get reborn as their daughter, She started her own life over again she just doesn’t realize it because she has no memories from being a baby the first time because she was actually a baby.
Highly believe that’s the case! I think it would tie everything together especially because her background is unclear and it makes sense because why else would she get reincarnated as the baby. I 100% buy into this
Plus, Liz has blue hair and green eyes just like her mother. Also the queen definitely had it out for her and her past life and I don’t think that was just because she was a commoner. I think the queen recognized her and wanted to finish the job.
So what happened to the real elizabeth? I actually dont like that the Brother knows her Identity, now he doesnt see her as his sister anymore