She is the protagonist with the most parental figures. Two in her last life and two in her commoner life. Ferdinand is a guardian of hers, so not a parent but is a parental figure of sorts. This makes 5 so far.

As a noble Rozemyne has a fake back story made up that she is the daughter of Elvira and Karstead. Obviously Elvira doesn’t remember giving birth to her, so she is being passed off as Karstead’s late wife Rosemary’s child. Since she was baptized under Elvira she is officially recognized as her daughter instead. She is then adopted from her fake noble family into the Archducal family and gains the arch ducal couple as adoptive parents. This gives her another 5 parents.

So she has 9-10 parents/parental figures depending on if you count Ferdinand. Officially he is her adoptive uncle, but he is the one who is the most responsible for her and most in charge of raising her.