Vicky pretends to be the real Eleanor Shellstrop in season one of The Good Place.
Vicky is actually a Bad Place demon recruited to perform the role of “Real Eleanor.” The deception is part of Michael’s neighborhood experiment: after Eleanor admits that she was sent to the Good Place by mistake, the demons use a supposed second Eleanor to create conflict and emotional pressure.
The fake backstory presents Real Eleanor as a virtuous woman whose life included hardship, self-sacrifice, and heroic deeds. She is portrayed as the person who supposedly earned the place Eleanor is occupying. The contrast is designed to make Eleanor feel guilty and inferior while also unsettling Chidi, who believes the newcomer is his actual soulmate.
The reveal is one of season one’s major twists. The apparently ideal Eleanor is not a second human soul at all, but Vicky playing a part. A common mix-up is assuming the character is Donna, Mindy, or another human associated with the series; those characters have separate identities and do not impersonate Eleanor in this storyline.