Yes, Chandra's possessiveness is very evident Abhinaya. The fact that he took her to Balgram for her exams was to make her forget her brothers' loss, by changing her focus on something that she would like to do.
His stand against Chanakya that Nandini should know her father's true colours w.r.t. Roopa, he knew instinctively how Nandini will react when she comes to know that she has a sister, and her father did injustice to Roopa by abandoning her, and also the real reason why she, Nandini, was kept closer to her father.
Chanakya --- As per his rule, MM cannot leave the Palace without King's or the PM's permission. King has already left the Palace. Helena and Chanakya will not allow Nandini to leave the Palace and nor get any information from Chandra to her. Nandini will have to rely on Daadi and Moora for more information.
I just wish Chandra should get hurt badly in the war , where he keeps mumbling Nandini's name, and Chanakya will be forced to bring Nandini to the war camp, to bring back Chandra to life. Nandini should fight as a warrior in Chandra's absence to motivate the soldiers and also save Chandra.
Then Chanakya will get to see the real bonding and strength of love between Chandini, and knowledge of Nandini's war tactics and her loyalty towards Chandra. Perhaps then, he would involve her in Chandra's Akhand Bharat scheme.