While Tear might not be happy about all this, Pharos's reactions have varied from nonplussed to excited. He doesn't really respond to threats- he has no reason to feel threatened. However, the prospect of being somewhere he can explore and learn more about what it meant to human was very exciting. And, if he learned anything from Minako, one big part of being human was talking to people.

This person looks interesting. Let's go talk to her!

"Hello. What are you doing?"