I wonder if this was always a kris blade or was it not a pendang blade adapted to be used onto a kris?
as for the Deity , I am not an expert of Chinese deity but I looked up a few images (I like the challenge)
Could she be Mazu? Goddes of the Sea? Especially revered by Chinese living in South-East Asia
Sometimes depicted with an object on her right or left shoulder and sometimes with a fly whisk, she is a Sea Goddess especially revered by Min people
https://en.wikipedia.org/wiki/Mazu