For those in the anime community, you already know what a yandere is (so this will just be a refresher) however for those of you who do not know. A yandere is person that is romantically obsessed with someone to the point of using violent means to get their arms. Often seen with a sharp weapon and a psychotic grin.
The Japanese word originates from the combination of yanderu meaning sickly and dere meaning love-struck. Put these two together and you usually get girl or boy who is so love-struck that they are considered sick. In other words a very crazy mentally unstable psychopath.
In the anime community you usually come across people with waifus/husbandos and there are some people who are attracted to these kind of people -- yanderes -- heaven only knows why. Now it is usually a general understanding that these characters are not real. That they are characters made up by the author in order to further tel