The Anointed's lieutenant vampire in WSWB. Staked by Buffy in same episode. Character played by Brent Jennings.

Acathla was in an obelisk that construction workers dug up outside of town.

"Acathla the demon came forth to swallow the world. He was killed by a virtuous knight who pierced the demon's heart before he could draw a breath to perform the act. Acathla turned to stone, as demons sometimes do, and was buried where neither man nor demon would want to look. Unless of course they're putting up low-rent housing." (Angelus, B1)

Angelus figures out that he can pull the sword out of Acathla and he (Acathla) will suck the world into hell. It takes Angelus' blood to open it and Angelus' blood to close it.

Pre-pre-historic parasite. The mother hibernates underground, laying eggs. The offspring then attach themselves to a host, taking control of their motor functions through neural clamping. The mother of the eggs in the basement under the school in Bad Eggs.

Also, picked up in the fandom as a term for rude or otherwise flamey people.

Claw Guy (also referred to as "Fork Guy" and "Silverware Man") has one hand missing which was replaced with a claw. He displeased the Master and cut his hand off in penance. (Giles tells this. It is not shown.) Angel warns Buffy about him and later Buffy uses him to lead her to Natalie French. Buffy later dusts him. (TP)

Demon raised by Ethan, Thomas, Diedre, Philip and Giles in their College Days and then raised again in The Dark Age. They all bear the Mark of Eyghon, which is an Etruscan tattoo.

The Mark of Eyghon, worn by his initiates. Eyghon, also called the Sleepwalker, can only exist in this reality by possessing an unconscious host. Temporary possession imbues the host with a euphoric feeling of power. (Ethan burns his off with acid and puts it on the back of Buffy's neck. She later has it removed.) Unless the proper rituals are observed, the possession is permanent, and Eyghon will be born from within the host. Once called, Eyghon can also take possession of the dead, but its demonic energy soon disintegrates the host, and it must jump to the nearest dead or unconscious person to continue living.

Kills Diedre and Philip, then possesses Jenny. Killed by Angel.

A demon brought forth to rid the Earth of the plague of humanity. No weapon forged can kill him. An army was able to dismember him back in the day (before Angel's time) and they buried the parts in the four corners of the earth. Spike & Drusilla put him back together. Character played by Brian Thompson (Also played Luke in WttH.) First appearance in Surprise, killed by Buffy in Innocence.

(Spike called him "big blue," Buffy called him "not the prettiest man in town" and Xander called him "an unkillable demon.")