Wanda Maximoff is also Scarlet Witch, reflected in her red costume and tremendous magical powers. WandaVision focuses on the Wanda part of the dual character, but her life as the Scarlet Witch is noted often in the series in the form of subtle Easter eggs.
Vision starts his day in episode one by reading the Westview Herald. The headline: “Little Baby June’s First Word Tickles Mother.” Comics publishers often reboot characters and give superhero identities to new people, and In one such iteration, June Covington worked under the name Scarlet Witch.
In the first episode, Wanda and Vision host the latter’s boss and his wife for dinner. Wanda pours everyone a glass of “Maison du Mépris” wine. That translates to “House of Contempt,” but the “M” in Mupris is so prominent it might as well read “House of M,” which is the name of a Marvel Comics miniseries from 2005 in which Scarlet Witch keeps changing reality, kind of like she does at the end of episode 2 of WandaVision when she rewinds time.
And then there’s vivacious neighbor Agnes (Kathryn Hahn). She might know more than she’s letting on about Wanda’s shifting reality. Agatha Harkness served as teacher and villain to Scarlet Witch in the comics, and if you take the first two letters of her first name and combine it with the suffix on her last name, you get… Agnes.