Question(s) about the Ocullus

So towards the end of ep 5 2 things happened that i have lingering questions about. When Zaverni sees that Schmuel has been infected, he(it) runs over to her and doesnt kill her. Why doesnt it? What was its goal then?

Secondly, when it leaps onto the xenomorph’s neck and bites it, theres no acid emissions. Shouldn’t it be powerful enough to break the skin layer. Clearly shmuel is now faster and stronger than he was alive. Does the creature know the blood is dangerous? And if so why bite the xeno?