demons.jkl
Jack O'Toole - The Zeppo
A zombie of sorts, Jack was resurrected by his grandfather. Jack then raised the bodies of his friends who had been killed. Jack was eaten by werewolf Oz.
James Stanley - I Only Have Eyes For You
A ghost, James killed his teacher/lover in 1955 and never got over the guilt. His guilty spirit began to haunt Sunnydale High around the time of the 1998 Sadie Hawkins Dance. Eventually, his spirit took over Buffy - while that of his lover took over Angelus. Through them, James was able to get over his guilt and move on to the next life.
Jesse - Welcome to Hellmouth, The Harvest
Jesse was turned into a vampire in Welcome to Hellmouth, but prior to that he was a close friend of Xander & Willow. Once he was turned, he led his friends to the Master's Lair and tried to kill them. He was staked by Xander.
The Judge - Surprise, Innocence
A demon who was originally brought into this world to eradicate humanity from this Earth. He would "...separate the righteous from the wicked and burn the righteous down..." Unable to be killed by any weapon forged, the Judge was hacked apart and buried all over the Earth. He was put together again by Spike and Drusilla. Buffy blew the Judge to bits with a rocket launcher.
Kakistos - Faith, Hope & Trick
An extremely old and evil vampire, he had cloven feet and hands. He killed Faith's Watcher and came to Sunnydale to kill Faith. However, he was killed by Faith instead.
Kathy Newman - The Freshman, Living Conditions
A demon who ran away from home and took a human form. She was Buffy's first roommate at USC Sunnydale. While Buffy was sleeping Kathy would perform a ritual that took all the goodness out of Buffy and into herself. Kathy's father took her back to the demon dimension.
Ken - Anne
A demon who lured young runaways and then sent them to a demon dimension to work as his slaves. Buffy decapitated him.
Kulak of the Miquot Clan - Homecoming
A demon who was able to produce blades from his arms that he fought with. He took place in Slayerfest '98 - fighting for the right to kill Buffy & Faith. He was accidentally blown up.
Lagos - Revelations
A seven foot demon who dressed as a warrior and wore armor. He wanted to retrieve the Glove of Myhnegon. Buffy decapitated him.
Lei-Ach Demon - Family
According to Glory - they were once a powerful warrior race and now they slink around hospitals sucking out the bone marrow from patients. Glory has these particular Lei-arch Demons attack Buffy. This bunch is killed by Buffy and Spike but we can assume that there are more out there.
Lissa- First Date
Demon worshipper tried to use Xander to open the Hellmouth by stabbing him and leaving him to bleed over the seal. Killed by Buffy and Spike.
Luke - Welcome to Hellmouth, The Harvest
A vampire, Luke was the Master's right hand man (so to speak). He was supposed to be the Vessel in a ritual that would allow the Master to escape his Hellmouth imprisonment. Buffy staked him during the ritual.
Lurconis - Band Candy
An eel-like demon that lived in the sewers under Sunnydale. Mayor Wilkins worshipped him and offered a sacrifice to him every 30 years. Buffy burned Lurconis to death.
