Serena

 is Samantha's paternal lookalike cousin and a recurring character.

Looks and Personality
Serena is a witch who tends to be a bit more progressive towards mortals than the rest of her family and loves to use her magic any time she wants. Her progressive nature has led her to follow Samantha's lead, and she has dated some mortals. She is a bit of a hippie witch and is always getting on Samantha's nerves.

Despite her constant plotting with Endora, Serena is in favor of Samantha and Darrin being married. This support led to her and Uncle Arthur losing their powers when the Witches Council threatened to depower Samantha for her mixed marriage. In reality, Serena approves of Darrin and Samantha, although she does think that they are a bit square.

Serena looks similar to Samantha, but has some distinguishing features. The former has black hair (except in the episode "Hippie, Hippie, Hooray" where she has blonde hair, making her look even more like Samantha still). Her hair becomes puffier as time went by. Serena has more make-up than Samantha in the latter seasons. Serena has a mark on her cheek that is different in every episode she is in, from a heart when she decides to try dating mortals to a fish mark during the Samantha and the Loch Ness Monster episode. Serena has green eyes. She tends to wear strange clothes and even ones that are too showy.

Portrayal
Although her appearance is different, Serena is occasionally used as a stand in for her cousin. This was why actress Elizabeth Montgomery played the dual role of Serena and Samantha in each of the former's appearances. When playing Serena, Montgomery was credited under the pseudonym "Pandora Spocks" in seasons 6-8.

According to "The Bewitched Book" (Herbie J. Pilato, 1992), Liz Montgomery used the personality of her own cousin "Panda" as the basis for creating Serena.

In some scenes with both Samantha and Serena in the shot, with no special effects used, Serena (or Samantha) is played by Melody McCord (with Montgomery's voice used). This usually occurs when Serena or Samantha is seen from the back.

Voice
Serena has a voice similar to Samantha's. In the latter seasons, Serena's voice became higher-pitched. When she laughs, she sometimes squeals.

Trivia

 * Although they call her "Auntie Serena", Serena is really Tabitha's and Adam's first cousin once removed, because she is Samantha's first cousin, not her sister.
 * Out of all the recurring characters, Serena is the witch that has appeared the third-highest amount of times. Only Aunt Clara precedes her.