>>68377703It wouldn't have solved anything, her offering Takeru the gun was an empty gesture and she should have known as much at the end of Alternative. Because it was kind of obvious that the Takeru that came back from his home-world would not waver again in such ways, not after what he caused to happen with his weakness.
Some people complain that Takeru's PTSD got too annoying and went on too long, but on the flip-side if anything it was solved too easily, since I'm almost positive you don't just get over that due to willpower.