Agatha Harkness

Agatha Harkness is the main antagonist of the Marvel series Wandavision, and is played by Kathryn Hahn. She is introduced under the alias "Agnes", seeming to be a nosy but well meaning neighbour. Her true identity as a witch named Agatha Harkness is revealed in episode 7, "Breaking the fourth wall", when she drops the absolute banger that is "agatha all along", her theme song. Her sexywoman status has mostly been condensed to within the marvel fandom and her reputation outside of it is mostly just her song and the winkTM.

Basic information
WIP

Angst
Her mother is among those trying to kill her after she is found to be using a specific type of dark magic. Throughout the scene, Agatha seems genuinely upset and angry for not being granted a chance to explain herself, and does not attack her mother until she tries to attack her first. It could be implied from this that her villainous nature partly comes from how her coven did not believe in her or give her a second chance.

Dominating
She is shown to have more knowledge of magic than Wanda, despite Wanda being vastly more powerful than she is, and uses that to her advantage on multiple occasions. She also takes advantage of Wanda's fragile mental state, and uses it to both convince her that Ralph Bohner is actually her brother Pietro, and to get to the root of where her came from powers throughout episode 8.

Eye Imagery
When revealed as Agatha Harkness, her eyes glow purple, much like Wanda's do, introducing the theme of them having similar powers.

Intelligence
As stated before, she is shown to be significantly more knowledgable about magic than Wanda. On top of this, she is able to quickly gain Wanda's trust and only reveals herself when she feels she has to. She is also shown to have manipulated certain events behind the scenes to try and force Wanda out of her fantasy world (luring vision to the edge of the hex, creating fake Pietro, etc).

MILF
She is literally hundreds of years old.

Power
Although not as powerful as Wanda, she is still shown to have a significant amount of power. Her many abilities include: telekinesis, mind control, transmutation, energy absorption and flight.

Purple
Her magic is manifested through purple energy, as well as wearing purple clothing garments at different points in the show.

Theme Song
Her iconic chart topping single of 2021, Agatha all along.

Twist Villain
When introduced, she shows no sign of having malicious intentions, however as said previously, she takes up an antagonistic role from episode 7 onwards.

Villain
Literally everything that's been stated...oh, and she killed sparky too.

Well-Dressed
Due to the aesthetic and time period changes throughout the show, we see Agatha as her false persona "Agnes" dressed in different stylish outfits that suit the time periods.

Quotable Catchphrase(s)
"That macrame's not gonna hitch itself! *wink*"

(sung) "It's been Agatha all along!"

"And I killed sparky too."