I'm a bit disappointed in this episode, and I'm losing sympathy for the characters. I find them shallow. Mitsuo's death - I somewhat felt for him. I got to know the guy better. I didn't like how the male students went off to battle while the female students stay back. It gives unfortunate implications. In some series like Valkyria Chronicles or Attack on Titan, both men and women fought along side, and both gender died. So far, no women died in this series. I see some death flags for Noriaki and Benjamin. With Benjamin giving Sharon a kiss (their relationship wasn't explore enough. It was weird seeing it), it triggers a death flag for me.
I bet only Ignacio, Karl, Claire, and Ariel will survive at the end of the series.