to be honest..she seems more like a calm, laid-back lady...like a female sasuke..with tsundere tendencies
What you just said sounded a lot like "sweet, short tempered." Yeah she was calm and laid back, but with her tendencies she wasn't all sweet.
After all we all thought Hashirama was calm and composed then orochimaru brought him back from the dead for the war and turns out he was exactly like Naruto
If you look at any of the early chapters and see portraits of Minato he looks a "stay out of my way" type person with a serious and angry expression but turns out he's quite possibly one of the most polite characters in the series.
That's why I'm saying she is like Sakura, Kushina, and Tsunade. Kishimoto made Hashirama like Naruto, Minato, and Jiraiya. He also made Sakura (Naruto's girl), Kushina (Minato's girl), and Tsunade (kinda Jiraiya's girl) all copies of one another. If you make the 4 men like each other, why not make the 4th woman like the other 3 women?