I'd like to explain the word " tsunndere".
Tsunndere is persons who do too strong icy reaction at specific times. Especially, we can use this word toward people who are bad-tempered in public but, when they are alone, they dally each other.
Next, I explain the word "burikko".
Burikko is persons who do very cute behavior at specific times. They try to entic persons who they like or feel kindly with her seductive charm. It's said they exchange their behavior whether persons who they like or feel kindly are there or not.