Ah I almost forgot *SPOILER ALERT*
As for why the Goddess chose Tamara... hmm... this actually will be explained later in my 2nd project; Nusantara: Bermuda Triangle, but I'll do my best to explain while keeping it spoiler-less as much as I could.
It has something to do with her personality, traits -everything that defines her and most importantly, She chose her because she is an outsider -someone who doesn't have a real link to Her 'world'; who can change the future posibilities & fix the problem the Goddess created Herself. No one is able to touch the Pink Crystal besides Tamara and her chosen one remember? Because She cannot directly interfere with fate and that's why She needs some help from 'outside'.
Um... do I explain well? I sometimes have a hard time with how to explain this particular element ^^;; as I said, more information will be explained in my 2nd project; Nusantara: Bermuda Triangle. It will explain the whole island's history & I think you will understand better after you play it in the future. I'm in the middle of making it now ~