Spike

Barley 200 years old he makes his first appearance in the episode “School Hard”. Spike, also known in vampire circles as William the Bloody carved his nickname by torturing his victims with railroad spikes. As a British vampire with a hard rock attitude Spike wildly sails into Sunnydale to help his sickly vampire girlfriend, Drusilla get better by tapping some evil energy emanating from the Hellmouth. Although he braggs about being able to kill 2 previous slayers he can’t seem to conquer Buffy and is even hit with an axe by Buffy’s protective mom.

At the end of the second season Spike betrays all of his vampire buddies to the slayer to escape with his true love Drusilla. She eventually blows him out and he hangs around Sunnydale.