"when Men of Light have earned his hate" - If I'm right in thinking that the men of Light are Numenorians or their descendants, then the "war" was probably the one of the Last Alliance. Sauron started hating Numenor long before that, but then Ar Pharazon just took him prisoner, and there wasn't really any war where blood is really that involved. It says that when Sauron came back to ME and found out that the Elendili escaped, he hated them even more.
"Close to the King was she of late, but
long before, in tide of fate I have been thrown into the war" - the mother was close to the King
after the war? Am I really that stupid or is this just a really confusing part?
Also, if my last two posts are somewhat correct, the people who this person betrayed are the descendants of Numenorians, and it happened at night, and it was most likely unexpected, since s/he was a "friend". And s/he remained when they didn't. ????????
???????
!IDEA!: s/he remained in memmory when the others were forgotten?
!IDEA#2!: "came and went" - could it be from Frodo's qoute "no, they never end as tales. The people in them come, and go...", and this person just remained for longer?
Geesh! So many guesses and none fully verified!