For the moment, it seems like that has been her function. She has shown herself to be sexually interested in/attracted to the MC and has somewhat leveraged that relationship to get him to help her. In doing so, some layers of her character have been peeled back and we're learning more about her, but still not enough, I'd say, to make it clear that her interest in him, and therefore her function in this story, is anything more than physical due to either him as a physical specimen, or because of some idolised infatuation or "daddy issues".
I would like to see to more exploration of Chandra's character, particularly the backstory as to how she and the MC have come to know each other, to perhaps get a better picture of her interest in him and to perhaps even see these feelings blossom into something more serious.