I’ve been thinking about this for a while, and I feel like her character is a bit wasted in this manga. While the "girl teasing the guy she likes" dynamic works, I feel like characters like “gakis” fit better with adults because of the implications involved. I’m not even saying there has to be a real relationship—most manga of that type don't usually end with the couple actually getting together due to the age gap—but it feels more entertaining because of the risks inherent in that kind of dynamic. Here, though, she just feels like Nagatoro but younger (I liked Nagatoro too, by the way).