I JUST realized this!
Ramanand Sagar's Shri Krishna's Revathy, Suwati Anand, plays the character of Manjusha Karanjkar, the evil sister-in-law of Archana (the lead).
How weird, right?
Suwati as Revathy
^^I thought that it might not be her in that pic, but then this close-up convinced me.
It's definitely her.
Suwati as Manjusha
And another note: I found this pic on the Sagar Arts page of some character called Chitralekha.
Looks like she played her as well?