Vampires have become the protagonists
of many popular television series and movies.
A vampire should exist in a sitcom like
"How I Met Your Mother"
as an ordinary citizen or secondary character.
This character would live an ordinary vampire life
and have no impact on the plot line.
The vampire, for example, could leave a party
and say, "Sorry, I have to leave," and people would
just say goodbye, unfazed by the vampire's exit.
Or, the vampire sits and complains to friends
about going to couples therapy.