Name: ACATHLA
Status: Demon
Traits/Powers: This demon possesses the power to literally swallow the Earth into Hell.
First Appercance: "Becoming"
Show: Buffy The Vampire Slayer
Other Info: He was stopped by a knight centuries ago. His body turned to stone with the sword still embedded in it, then was concealed in the stone tomb and buried deep beneath the ground. With that, two vampires open the tomb, revealing the body of Acathla inside. Only someone worthy can remove the sword from Acathla's body, freeing him to reign terror on the world. Only Angels blood can remove the sword.

Name: ADAM
Status: Bio-Mechanical Demonoid
Traits/Powers: He is a  kinemtically redundant bio-mechanical demonoid.
First Appercance: "The I In Team"
Show: Buffy The Vampire Slayer
Other Info: Designed by Maggie Walsh. He had a design flaw that made him turn against the Initiative and Kill Maggie Walsh. He is probably the fiercest smartest villain yet.

Name: AMPATTA
Status: Mummy, Deceased
Traits/Powers: Can only continue to live if she periodically drains the life out of an unwitting victim with a deadly kiss.
First Appercance: "Inca Mummy Girl"
Show: Buffy The Vampire Slayer
Other Info: Released when the seal that held her at bay was broken, this 500-year-old Incan mummy wreaks havoc on Sunnydale.

Name: THE ANOINTED ONE
Status: Vampire, Deceased
Traits/Powers: Unknown
First Appercance:
Show: Buffy The Vampire Slayer
Other Info: Was a boy that was turned into a vampire for a special purpose, which we never got to know. He was killed by Spike.

Name: Ano-Movic Demons
Status: Demon
Traits/Powers: Must eat wife's first living husbands.
First Appercance: "The Bachelor Party"
Show: Angel
Other Info: Ano-movic demon's are mostly peaceful. They were a nomadic tribe with violent leanings, but the domesticated themselves. They have a ritual in which they have to eat the first husband's brain if they marry.

Name: ANYA
Status: Vengeance Demon, now human.
Traits/Powers: She grants the wishes of women scorned.
First Appercance: "The Wish"
Show: Buffy The Vampire Slayer
Other Info: Granted Cordelia a wish--to have Buffy never to have come to Sunnydale. The only way she can be stopped in to have her locket destroyed.