Answer:
A yandre is a character, usually a girl, who fits the archetype of being genuinely kind, loving, or gentle, as well as obsessed with their love interest, sometimes demonstrating this through violent behavior.
A tsundere is a Japanese term for a character development process that depicts a character with a personality who is initially polarized warm/soft, cold, temperamental, hotheaded (and sometimes even hostile) before gradually showing a warmer, friendlier side over time.
