I just want to say that the design for Beck sucks. What about that design is supposed to say "spunky immature boyish tagalong that wants to be a hero but doesn't know how"?
What about working at a diner indicates to anyone that she's trying to accomplish this goal either? A character's job is really important to what kind of person they are. Fight Club's Narrator works in soulless risk assessment, Superman+Spiderman are journalists because they have privileged access to major events, 1984's Winston works in the Ministry of Truth because history rewriting is the most important part of Orwell's vision of how the party maintains control.
If a young girl is trying to be a superhero in a world where they exist, she should be in some line of work that allows her to be around and to annoy superheroes to get more involved in their world. She'd be trying to be an assistant or something, not sitting complacent in a diner.
The fundamentals to writing are lost on him.