*villains who are made of poison, and whose words are poison, and cause people to rot from the inside out
*villains with extra arms who can detach and implant them to control people, or form a new (self-aware) character from one of them
*prehensile hair (which strangles people)
*hair which suddenly grows 8-10 feet when a character is weakened (and then drains others' life force)
*characters who sprout plants from the wound when they are cut
*lonely cockroaches looking for friendship, mysteriously transformed into young men with long, very matted hair
*nonsentient objects (i.e. combs) holding grievances which cause them to become ghosts and demons
*inappropriate or enthusiastically overused religious symbolism (i.e., a Catholic priest from Texas imprisoning souls in a Star of David)
*youkai markings
*babies growing on trees after the hopeful parents tie a ribbon around the branch