Nulli is inquisitive. Have a quirk, strange physical feature, or strong emotions? Have literally anything that sets you apart at all? Nulli wants to know all about it.
Want to harass someone who doesn't 'belong' in your favorite haunt? Nulli goes wherever there are people, with no regard for how much he sticks out.
Nulli doesn't feel fear. Are you someone who is used to intimidating those around you? You might be fascinated by someone who doesn't realize that he's supposed to be afraid of you.
He wavers between adhering to social norms and deviant behavior. At first, I thought that his behavior was random, but as I have watched him, I have begun to suspect that it is not.
When a person violates social norms to the degree that she does, they are generally shunned by their peers, but she is fiercely protected. I would like to understand why.