No she didnt die she "disapeared" probably after the movie desler found her and brought her back and they lived happy forever but since this the writer of yamato refuses to do an epilogue in every season and movie we will never know :)
i wasted 2 weeks watching every season and every movie of this anime just for yuki to die in the end thats a just a massive disrispect torwards the fanbase.
The overall quality of the movie and CGI is very good but they save earth again its starting to get a little repetitive.
I just hope the remake is better :)
