Looking for a long-term vampire line. Complete with picking up some lore and world-building. I'm specifically interesting in any of the following: long grudges, losing and gaining humanity, the upsides and downsides of love that (was supposed to?) last forever, a line between two vampires who were turned by the same sire, siblings who have an eternally complex relationship, back-dated threads (like centuries earlier), playing old vampires with rich histories. Primarily het (I'd play either a male or a female if we can come up with something super interesting) or femme, but platonic lines are fine too!