Who is Khin Myo from The Piano Tuner and what is their importance?

Khin Myo is a beautiful Burmese woman who Edgar meets in Mandalay. She is the servant in charge of the guest quarters for visiting guests of the army. She is the daughter of a rich member of the Burmese elite and was sent to a good school. She learnt English and Math, and later taught English. She developed a relationship with the British schoolmaster, but he died when his amputation wound became gangrenous. The next schoolmaster made advances and then dismissed her when she refused him. That was when Captain Nash-Burnham took her in and gave her the job as a servant in the guest quarters. She still continues to teach English.