If anybody has read the Novel can you please tell us more about each character. Like their names and background.

 Adapted from the novel "Hong Thong" (หงษ์ทอง) by Senee Boodpaked (เสนีย์ บุษปะเกศ). this what I found 

http://www.book-ddshop.com/product/1684/%E0%B9%81%E0%B8%81%E0%B9%89%E0%B8%A7%E0%B8%A5%E0%B8%B7%E0%B8%A1%E0%B8%84%E0%B8%AD%E0%B8%99-%E0%B8%9E%E0%B8%B4%E0%B8%A1%E0%B8%9E%E0%B9%8C%E0%B8%84%E0%B8%A3%E0%B8%B1%E0%B9%89%E0%B8%87%E0%B8%97%E0%B8%B5%E0%B9%88-2-%E0%B9%80%E0%B8%AA%E0%B8%99%E0%B8%B5%E0%B8%A2%E0%B9%8C-%E0%B8%9A%E0%B8%B8%E0%B8%A9%E0%B8%9B%E0%B8%B0%E0%B9%80%E0%B8%81%E0%B8%A8-%E0%B9%80%E0%B8%82%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B8%AA%E0%B8%B4%E0%B8%99%E0%B8%84%E0%B9%89%E0%B8%B2%E0%B8%AB%E0%B8%A1%E0%B8%94

These two women are as different as night and day, like birds of different feathers. One is of noble birth, elegant, and her name is Kaew. The other is just a local girl, of humble origin, and goes by the name of Mae. But strangely enough, they share many things in common – their physical appearance, their inner disposition, their emotions, and they've been intertwined for a long time.

Because of their similarities, these two women like to switch places, creating chaos along the small canal of Bangkok Noi. And then, an unexpected event occurs.

When Kaew is taken to Chiang Mai as a noblewoman of the skies in Wiang Fai, it unveils many mysteries, dangers, and hidden truths that have kept these two women shrouded in secrecy for a very long time.

and this one 

Saneh Busapaksa 

there are couple of other novels from the same author on that website.  I used google to translate