"Tsundere (ツンデレ?) (pronounced /(t)sʌnˈdɪə(r)/ in English or /t͡sun.de.ɽe/ in Japanese) is a Japanese concept of a character archetype which describes a person with a conceited, irritable, and/or violent personality that suddenly becomes modest and loving when triggered by some sort of cause (such as being alone with someone). It can also describe a contradictory personality which is good-willed on the inside, but with a harsh attitude on the outside."

Though I get the feeling you don't have a sweet candy center.