Oz
Oz is a werewolf. Apparently he was bitten by his toddler cousin, Jordy, only to find out later that Jordy was a werewolf. For three nights of the full moon each month, Oz chains himself up to stop his werewolf-self from hunting the streets of Sunnydale. Everyone knows that Oz is a werewolf and they take turns watching him on full moons. Oz has only one enemy when he is a wolf and that is Cain Gibb a werewolf hunter who wants his pelt so he can sell it to Sri Lanka. Oz has proven useful when loose on full moons he has helped defeat crazed demons and vampires. Oz went through a rough spot at one time with Willow when he caught her kissing Xander but they reconciled. Oz lost his virginity to Willow on Christmas. He is part of the band Dingoes Ate My Baby. Oz failed his senior year so he could be with Wllow. After graduation he went on to college and Sunnydale University with Willow. He met Veruca who turned out to also be a werewolf and had a werewolf affair with her. In his human form he was mad at her and himself for letting it happen and on the last night of the full moon to stop Veruca from killing people he offered to make love to her and locked her up with him. Willow came in in the morning and caught him sleeping with her.They then broke up and he left school to give Willow and himself some time apart. He has left the show and it is not known if he is coming back. Oz was played by Seth Green.