 Throughout the Buffy series, Spike's character changes and develops the most out of them all.He begins as "evil" and obsessed with Drusilla, then becomes a depressed drunk after Drusilla leaves him for a Chaos demon because he is not "demon enough" for her anymore.He then heard about the "Gem of Amara," a gemstone that is rumored to give vampires the ability to walk in the sun; it was called a kind of holy grail for the vampires because it was only assumed to be real.