Probably. It's too early to say for sure, but I'm guessing her mother and Noji will play a more important role in Vanessa's story than Zara's. I think you're kind of overlooking the fact that meeting the Cyruses is also a big event for Vanessa. I mean, don't you find her behavior in chapter 4 wary and defensive? She observes and gathers information and manipulates because she sees them as a potential threat. I got that impression the first time I played and the second time that impression only strengthened.
All people wear masks when they interact with people from different social circles. To be sure that Vanessa was indeed manipulating Bella, we need to see how she behaves with her friends. What do you think she talks to them about? Her mind games or clothes, fashion, expensive jewelry, guys and the latest gossip? Was Vanessa more cautious around Bella? Probably, yeah. But it makes sense, they started hanging out for a few days. I personally don't think Vanessa plays her manipulative games 24/7.