We never know the thief’s real name in this story – when he introduces himself to Arun, he lies and says his name is Deepak. “Deepak was about my fifth name,” he confides to the readers, “I had earlier called myself Ranbir, Sudhir, Trilok and Surinder. “
I would say an unreliable narrator because that kind of narrator is the best at keeping secrets from the reader. If that's not an option, then a restricted narrator because they only know a limited amount of information.
