"Yandere" is derived from the Japanese words yanderu, meaning to be sick (mentally or physically), and deredere, meaning affectionate or loving. Simply put, a yandere is someone who is lovesick, someone who has been driven to insanity by extreme obsession or love, thus resulting in abnormal behavior if not violence. Take the Tropes Love Makes You Crazy, Love Makes You Evil, Love Hungry, and Stalker with a Crush, and condense everything into a singular personified character archetype.