n.名詞ツンデレShe's such a tsundere; one minute she's yelling at you, the next she's offering you a snack.
adj.形容詞ツンデレ的なHis tsundere behavior was confusing; he'd insult her cooking, then ask for seconds.
n.名詞ツンデレな人He's a tsundere, always acting tough but secretly caring.