He is broken, by the trauma of his past, of memories of the betrayal of his beloved mother who ran away leaving him alone to face the taunts of the society and the crudeness of his father.
Yet these two connect for a few moment in that poignant scene, somehow united by their pain & grief.
Was Rudra shocked by Paro's reflection or his own? of the kind of emotional vulnerability he had displayed? He may be aggressive, rude with a wounded soul, but emotionless, he isn't.
P.S- absolutely loved the last scene. a big well done to Sanaya and Ashish.