I would say <span>irritation threshold.</span>
Answer:
He is fascinated by Stargirl's unusual behavior, and eventually gets close to her and enters into her world. He also feels the pull to be normal, and he tries to help Stargirl understand that. Leo is more self-aware than either Stargirl or his high school peers. He analyzes the behavior of the group toward Stargirl.
Explanation:
I love this book
