Spike
Spike first appears in Sunnydale in Buffy's second season, in the episode "School Hard", accompanied by his longtime love Drusilla. Spike has the standard powers and vulnerabilities of a vampire. But he seems more resistant to the sun light than any other vampire in the series. He also has a more varied diet than just blood. He can identify and track someone by scent alone. One of the factors making Spike so deadly an opponent in battle is his complete disregard for tradition and rules. He loves combat for the sheer joy and adrenaline rush. He particularly appreciates fights that pose a challenge and his fighting style blends kung fu, karate, and various other martial arts.