Who is Lun Tha?

Lun Tha is a Burmese man charged with delivering the Burmese King's gift to the King of Siam a beautiful and intelligent young woman named Tuptim. He makes his delivery, but not before falling completely in love with Tuptim. He risks his life just for moments with her and later runs away with her when the palace is occupied with the British visitors. After Tuptim is captured by the angry King, Lun Tha is found drowned in the river.