Question about the painting at the end of Republic of Thieves

I just finished reading all three books, and I have a question concerning the painting given to Locke at the end of the story.

Is it implied that Sabetha is supposed to be the reincarnation of the woman in the painting? Or is it more that Locke, being supposedly the reincarnated necromancer, has a "type"? (Assuming we trust the source of course. Which I kinda don't.)