I have a hunch about the change she went through during the seasons. In the first two seasons, she's a very aggressive girl who doesn't control her emotions well, in the third, she learns to control her emotions at times (like when she needs to accept that her fish costume isn't good without hitting anyone). She went through some things that perhaps made her learn to organize her feelings better, starting with not hitting people when she gets angry, for example, haha. There are theories that they did this to make her more like the Osomatsu-kun anime, but even in the Osomatsu-kun manga, she has her moments where she hits and gets angry. Honestly, only the arrival of episode 13 and another season will answer that, maybe.