@stilgar
She is a shell to momentarily protect tarou's heart.
She made him more active and socialize with others.
HOWEVER, She is also the reason tarou can't move on and be with everyone.
It is not her fault, of course, it is because tarou can't escape the cruel future where if he falls in love with others, he will see her floating "corpse" for the rest of his life.
If he doesn't go with anyone and retreat with eve he will live alone, which in turn will make eve unhappy.
So she is both the ideal/worst girl for tarou.
I still go for ebino ship though.