Soul-Link Episode 4

Even if the terrorist group Hallalax had successfully take control of the Space-Station Aries a bunch of Cadets hadn't been captured yet, they were: Ryota Aizawa, Sayaka Nagase, Shuhei Aizawa, Nao Morisaki, Shigemichi Morimoto, the instructor Cellaria Markelight and the suspicius Yuu Amanami who hadn't still revealed her name and they seized a block of the Space Station.
These one decided to hold a trap for the terrorist luring them to the bulkhead, killing one or two and then closing the door before they could enter. The trap succeded but both Shuei and Cellaria were lightly hurt. Nao who got worried about Shuei's wound noticed that one of the terrorist was still alive and she wanted to take him to the infirmary where she had a small flashback of when she met Shuhei and his younger brother Ryota.
Shuhei joined Nao at the infirmary but while she was removing the sticking plaster from the scratch on his face, the uncounscious terrorist became a blue gelatine and tried to attack them.However it seemed to evaporate soon.
Meanwhile Kazuhiko from the control center received a mail with a request for help from a civilian from another block of the station.
There was a small discussion about going to rescue him, Kazuhiko suggested that that could be a trap and that a soldier have to think about his own life, on the other hand Shuhei thinks that the first soldier's duty is to protect civilians. So Shuhei taked a small maintenance ship and went to rescue.
In the block he found Aki Nitta, a cadet, and Shigemichi Morimoto the vice-director of the space station. They told him they sent the mail and that they simulated an air-leakage to keep away the terrorists. When they came back to their block they found that Aki and Kazuhiko are siblings as they started quarrelling. Nobody noticed that the terrorist were getting ready to realiate...