Mercedes McNab played Harmony for the final time on Buffy in 5.14 Crush. Harmony then moved on to L.A., after her heart was broken by Spike for (nearly) the last time.

In 3.22 Graduation Day (Part Two), Larry and Principal Snyder are killed by the Mayor. Harmony is bitten by a vampire. She returns in season four as a fabulous vampire. I’m …

Harmony seems to be unaware that she is an ambidextrous biter. In 5.09 Harm’s Way, she tries to prove she didn’t kill a human:

Harmony: “I didn’t kill him! I’m innocent! …

In 5.09 Harm’s Way, Tamika comments that Harmony’s desk (and thermos) are covered with unicorns. We know that she loves the mythical animals from the Buffy episode 5.02 Real Me.

In 4.03 The Harsh Light Of Day, we learn the Harmony and Devon once dated:

Buffy: “Harmony. A vampire? She must be dying without a reflection.”
Willow: “She just made me so mad. …

Merceded McNab (Harmony) was added to the opening credits of Angel from the episode 5.17 Underneath.

In the Angel episode 2.17 Disharmony, vampire Harmony goes to L.A. to find her old school friend Cordelia after she’s dumped by Spike. Willow and Cordelia talk on the phone about …

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 …

The WB promoted the Angel episode 2.17 Disharmony, starring Harmony Kendall, with the tagline “Evil has never been so blond”.

Harmony’s surname is Kendall, seen for the first time in the Sunnydale High yearbook in 4.03 The Harsh Light Of Day. It may come from Sarah Michelle Gellar’s character name in …

Mercedes, who played Harmony Kendall, has been acting professionally since she was 10 years old. She is probably most widely recognised as playing the Girl Scout in the film Addams …

In 5.09 Harm’s Way, Harmony mentions that she was vamped during her high school graduation - seen in Buffy’s Graduation Day, Part Two.

Angel and Spike are the only two characters to appear in the final episodes of both Buffy the Vampire Slayer (7.22 Chosen) and Angel (5.22 Not Fade Away).
Additionally, Angel and Harmony (who …

There is a unicorn-shaped candle in the Magic Box in 5.13 Blood Ties. This is possibly a reference to Harmony who, we discovered in 5.02 Real Me, likes unicorns.