Jinx was one of Glory’s faithful minions. He revealed to Ben in Checkpoint that Buffy was the Slayer. Ben beat Jinx up so he couldn’t reveal information on Buffy and the Key to Glory.

The Sisterhood of Jhe were an apocalyptic cult, seen in The Zeppo. They were female demons with long dark hair who attempted to open the Hellmouth.

Jesse was the best friend of Willow and Xander. Jesse had a thing for Cordelia, who constantly rebuffed him. Jesse chatted up Darla in The Bronze, not realising she was a vampire. She took him to the Master, and Jesse was killed and sired by vampires to be used as …

Jenny Calendar was the Computer Science teacher at Sunnydale High, and also secretly Janna Kalderash, a Romany from the tribe who cursed Angel with his soul. Jenny was sent to Sunnydale to make sure that the curse was working, but she became friends with the Scoobies and liked Angel. Jenny …

Janus was the god worshipped by Ethan Rayne in Halloween. In Roman mythology, Janus was the two-faced Roman god of gates, of doors, and of beginnings and endings, and was worshipped at harvests, marriages, births, and other kinds of beginnings.

Janice Penshaw was the rebellious friend of Dawn who sneaked out on a double date with Zack, Dawn and Justin at Halloween in All the Way. She was also mentioned by Dawn in the episodes Doublemeat Palace, Dead Things, Normal Again and Seeing Red.

James Stanley was a student at Sunnydale High in 1955 who had an affair with his teacher Grace Newman. He shot and killed her then killed himself. His spirit possessed people in the school, seeking redemption in I Only Have Eyes For You.

Jack was the school bully who was killed in a drive-by shooting, but his grandfather brought him back as a zombie within ten minutes. He threatened Xander with the knife he called Katie, then made Xander drive him and his zombie buddies around for the night, before setting a bomb …

Jack was the manager of the student campus bar at UC Sunnydale. He disliked pretentious students and served them Black Frost beer which had been bewitched by his warlock brother-in-law. Anyone who drank the beer (including Buffy) turned into a Neanderthal, seen in Beer Bad.

Willow’s neglectful father was called Ira Rosenberg, mentioned only in the episode Passion and never seen on screen.

Holly was a popular Asian girl at Sunnydale High who was joint winner of the Homecoming Queen competition, along with Michelle Blake. They beat Buffy and Cordelia to the prize in Homecoming.

Holden was an ex-schoolmate of Buffy’s who was sired as a vampire by Spike. When he rose as a vampire in Conversations with Dead People, he and Buffy had a heart to heart in between fighting, as they had both attended Sunnydale High together. Holden attempted to ‘Psych 101′ Buffy …

Hobson was a member of the Watcher’s Council who went to Sunnydale Arms to prepare Buffy’s cruciamentum. He was murdered there by Zachary Kralik and Blair in Helpless.

Harmony’s surname is Kendall, seen for the first time in the Sunnydale High yearbook in The Harsh Light of Day. It may come from Sarah Michelle Gellar’s character name in All My Children - Kendall Hart.

Harmony was a pretty and popular girl who was also selfish, mean and empty-headed. Best friend of Cordelia Chase. Harmony spent most of her school life hanging out with friends and bitching about those less fortunate than herself. During the huge battle with the Mayor, Harmony was bitten by, and …