Space anime movie

I watched an anime movie in either 2007 or 2008. It took place in space and the characters were fighting a war against aliens. There were 2 men that were the main characters. One of them was named Alex. There was also a woman who hung out with them. There was another character named Ariel. She had very long hair. I think there was a man with her. Later in the movie, Alex dies. His friend gets very upset because he had warned him not to behave so carelessly.

Got something to say?