I've been playing since the very beginning, and it honestly started out as such a cute game. Natasha was one of the main characters - along with Tony, Jan, and Loki - and I think the third one to join the campus. In the beginning it was very much a school, with the fighting coming from rival schools, but it was more of a character collector, and the writing was absolutely fantastic. Really fun, witty, but with some nice sincere moments thrown in. It was the writing, the character designs, and the unique actions (many of which are adorable and/or hilarious) that really hooked me on the game.
Unfortunately they got greedy and it just kept getting more and more expensive, and harder to earn things in the game without spending any money. Now you pretty much have to pay for anything new, and there's hardly any story anymore. It's so disappointing.
Natasha's style fits her in this game. She's pretty standoffish, intimidating, and tries to act like she doesn't care about anything, except for when she flirts with people to get information. It was fun to watch her slowly evolve and open up.