I am thinking what if this new girl who seems to know Ahemji is in love with him, but she is a good self-sacrificing girl. Just because she is Rashi's friend, she doesn't have to be negative. The CV's do some times manage to show some irony in some situations and characters. Because of Rashi, the girl feels that Gopi doesn't deserve Ahemji who doesn't love her either, so she naturally sympathizes with him and can't help craving for his attention. But then she recognizes Gopi's reality and her true worth and sees how Gopi deserves Ahemji who is not very open with his feelings. That makes her swallow her pain and her feelings for Ahemji and she helps Gopi and her Ahemji open up to each other.
I think instead of another negative character, it is time to introduce a positive character closer to Gopi in nature. We have so many negative or semi-negative female characters in the show.