https://en.m.wikipedia.org/wiki/Tsundere
Tsundere (ツンデレ, pronounced [tsɯndeɾe]) is a Japanese term for a character development process that describes a person who is initially cold (and sometimes even hostile) before gradually showing a warmer, friendlier side over time. The word is derived from the terms tsun tsun (ツンツン), meaning to turn away in disgust, and dere dere (デレデレ) meaning to become ‘lovey dovey’.
Writers from Mars would be so easy in Japanese!
