I'm trying to find a manga that I once read. The main character is a female lead (FL) with pink hair. She is also a witch in a kingdom/empire (I don't remember which one it was) where witches were hunted. The FL is the last/one of the last witches and gets taken away by the emperor to remove/solve a curse from another witch.
It is probably an isekai (reincarnation)/time travel, because she remembers (from a book or past life, I don't know) that she died at the palace (I forgot how). I believe that the FL was able to transform into a bird. She also has a caring family and they tried to hide her when the emperor came (when the emperor was at their mansion, the FL transformed herself into a bird and at some point, the emperor put her in a birdcage).
I believe that, at the capital, she lived alone (without other nobles, but with maids and so on) in a mansion.