Miramanee's ...
Kirk's "accidental" inclusion into her society really screwed up the guest star's lives. Salish & Miramanee both lost all, thanks to "Kirok." And, of course, Kirk lost a lot, too, because of him. One of those "be careful what you wish for" kind of stories, when he finds himself living a (relatively) carefree life, like in his daydreams. Edith Keeler was very beautiful and very sweet, but I really hate to say this ... Edith's reason for dying seemed very false and forced to me.
We see her giving odd speeches to bent, old homeless people. We see some of her "gifted insight," as Spock calls it, during her talks with Kirk. But her literally "changing the world" doesn't ring true, for some reason. Probably because we only see it happening through Spock's words and a headline. If only Edith had already been in a correspondence with important people, just a line of dialogue about a former chance encounter with Eleanor Roosevelt would've given her denied destiny so much weight, to me. Then, her getting hit by a Mack truck would've really "hit" me hard. As it was, it just registers as Another Kirk Conquest Bites the Dust. But I love the actress playing her, she's exceedingly charming in the role ...