King Porus
In "Sikandar" a very daring Roxane follows Alexander incognito to India and manages to gain admission to King Porus (in the Indian version: Puru), a conversation with a young, friendly Indian village woman named Surmaniya, Roxane learns about the Indian feast of Rakhi which is being celebrated at that very moment with the purpose of strengthening the bond between sister and brother (0:25–0:30). On this occasion, sisters tie a ribbon (i.e. rakhi) to their brothers' arms to symbolize their close relationships, and brothers offer presents and assistance in return. Besides, Roxane is also told that the relationship need not be one of consanguinity; every girl can choose a brother. Therefore, she decides to offer the rakhi to King Porus, who accepts the relationship after some hesitation, because he feels the need to apologize to Roxane, Darius's (a.k.a. Dara's) daughter, for not having helped her father when he asked for assistance against Alexander. As a result of their bond, he offers her gifts befitting her rank and promises not to harm Alexander (0:32–35). Later, when Porus comes into hand-to-hand combat with the Greek king, he stands by his promise and spares him (1:31). Interestingly, the rakhi episode with Porus is still to this day very popular in India and is cited as very early historical evidence for the origin of the authentic Hindu festival called Raksha Bandhan. Although examples of that legend can be traced in internet forums, Indian newspapers, a children's book and an educational video, I was not able to find its ancient origin.