Masha is a female langur, and leader of the Bandar-Log.
Masha is mean and competitive. She is also very self-absorbed. Due to being the leader of the Bandar-Log, she feels entitled to a lot of things and can be very bossy to her followers.
Although she is no where near as bad as Shere Khan, she can still be a nuisance to Mowgli and his friends and a considerable threat at times. Despite this, she is shown to sometimes be allies with Mowgli and his friends on the situation at hand.