Anyways in ekta soaps, there is no such thing as a 'sort of bad guy', if they are evil they are really evil. 😆 If Nikila is really evil to wish the death of someone else, I dont think she would go out of her way to not hurt Shashank. Nikila could have easily killed him, ekta goes out of her way to show us that Nikila is trying to not physically hurt Shashank, but we think she is ready to sacrifice Gauri for Shiv. And if you noticed everytime Gauri is in some accident like the shock and the fire, there is genuine concern in Nikila eyes like she is worried something bad is going to happen to Gauri.