Read what I just wrote above your post about Pinchas and Eliyahu and you'll see a good example of what I'm talking about.
you made up that it's a reincarnation. (of mission. Like the reincarnations (of mission you say) that the arizal describes in shir hagilgulim).
But hte arizal lists them and doesn't list hagar and keturah as being that situation.
You have invented your own idea that G-d sent keturah the mission of Hagar. Do you have ruach hakodesh?
And saying it's like those spoken of in the arizal. I guess you think the arizal missed it out.
Anyhow, Rashi did not mention anything of the sort.
You are clearly reading into rashi a completely different thing to what Rashi was saying.
He said ZOH HAGAR. This is hagar.
you're saying.. Well, actually rashi is saying it's not hagar, but it's somebody with the same mission as hagar..
That is not what rashi said.