Daniel "Oz" Osbourne

Oz (portrayed by #SethGreen) is a brilliant (yet generally unmotivated) student, and part-time rock guitarist. He is Willow's first and only boyfriend, and an active member of Buffy's inner circle, despite the fact that he has recently become a werewolf. Portrayed as taciturn and unflappable, the contrast between his outward coolness and his violent animal episodes is an example of the show's efforts to subvert usual character expectations, as well as to display double-personalities (like Angel/Angelus).