[Kazu-kun]

Originally Posted by LoweGear

Who's to say that she doesn't encounter a situation in the future that really tests her determined

There's a different between a situation that is so tough it tests a character's determination and a situation that tests their determination because it force them to face a previously established character flaw. Overcoming toughs situations doesn't equal character growth unless there's some emotional flaw to overcome as well.

For example, I compared Fine to Nogi Wakaba, right?

Spoiler for nogi wakaba wa yuusha de aru spoilers:

Besides similar looks, Wakaba is as determined and brave as Fine. The difference is that Wakaba is also shown to have problems dealing with people, in the very first character too. That's her character flaw that she has to overcome later on, as she's chosen as the leader of her team. Being the leader tests her determination because it forces her to face her issues. That's room for genuine character growth.

Fine, on the other hand, reads like an static character to me. She had an entire episode to herself and all we saw were strengths and positive qualities. No character flaws or emotional weaknesses, no room for development whatsoever.