Rama, Lakshmana, and Kabandha
You can read more about Kabandha at WIkipedia.
From the Museum site: Opaque watercolour painting of Rāma and Lakṣmaṇa seated on the arms of Kabandha. Kabandha has a huge head to which are attached long strong arms and short legs. He has flame-like reddish hair, sports a moustache, and on his forehead are vibhuti (cow dung ash) and a tripundra (three horizontal lines). He wears a fillet around his head and various types of earrings and bracelets. The green-complexioned Rāma and the gold-complexioned Lakṣmaṇa, bow and quiver slung over their shoulders and brandishing swords, sit on Kabandha’s arms in order to cut them off.