So I joined a roleplaying group, and we meet on IRC.
Have a look at this wonderful relationship chart I compiled after we had finished generating our characters (which ended with rolling on a table of inter-party relations).
It looks like this.
You see the bright red lines going everywhere? Those are
type 1 yandere.
Rachel, who is directly involved in 3/4 (and indirectly involved in the 4th) of those, looks sort of like
this, except for the fingers which look more like
this.
And everybody is a zombie.