Tsundere is a Japanese term for a character development process that describes a person who is initially cold and even hostile towards another person before gradually showing a warmer side over time. <<< Me. I always hate to admit this side of me but i gotta say that i am a tsundere. Most of the time, what i say is the opposite of what i actually want to say. For instance, i can say, "Go away. You're stupid. I hate you." But what i meant to say was, "Please stay. You're hot af. I love you." So uhm... please bear with me.