>>2282981It took some time for me, I didn't think much of her through the entire first part of the show, I think I actually hated her a bit.
Then suddenly, somewhere after the junketsu Ryuuko episode I had a sweet dream about her and my opinion of her changed entirely.
It's her personality mostly, the tomboyish attitude.
Re-watching the show I realized she looks pretty cute too when not fighting bad guys.
I especially liked her in the jacket she had in the first and last episode.