It was a tough grind for Kangna Ranaut to play the mutant Kaya in Krrish 3. Considering the special look and attire in Rakesh Roshan’s sc-fi film, the actress had to work hard in getting into the character. Moreover, she was not allowed any self-indulgence during the shoot. B-Town actresses are known to have their whims and desires fulfilled on the sets but not when it came to working on this set.