Maybe she's not. I don't think Larian stated all the companions would have a tadpole in their head. Maybe there are two types of companions in this regard. Because it seems we will meet some after act 1.
She does have a tadpole. You have the obligatory exchange of memory and you are able to question why she seems so unconcerned about it.
Do recall Larian toying with the idea of having some non-tadpoled companions though...
