Well, it is actually very recently that she has started to be inegrated with the others, mainly do to the fact that she is a prototype of one of the experiments being conducted...I say that she has probably only known Ralyn for a few months, if that...
I was her to still be rather unknown by the others. They introduced Ralyn to her probably due to his calm and patient demeanor and lack of fear. He also is not very threatening, so that is also something that has to be factored into their introduction.
At least that is what I am thinking overall...She is rather unknown in the facility X,3