@Hey3210
It might be a little exaggerated but she has extreme trust issues because of a man who literally was all smiles until he was continuously beating her for the good part of 11 years. Also, at the very end when the man promised her the freedom she always wanted he then killed her dashing any hope in the process. And if you remember the count was also some kind of a saviour because unless the scars she has on her body were from before the time travel she was beaten at the orphanage too.
My point is I think she is very justified in being extremely wary to people who she had literally just met and were acting almost like when she had first met the count, nice and affectionate.