Shock and Mourning.
He had been in the communications room when it happened. The chatter aboard the Lost Light was beginning to depress him with how dark it seemed and he couldn't help think that it was very much akin to how it felt during the war. The memories of that time, of when he nearly died after Soundwave's assassination attempt, were coming to the forefront as though something about recent times were buoying them. His friends were all alive, though, and he kept telling himself that as he watched the monitors and kept his audials open for anything that Red Alert could use for security purposes.
But he could not have expected the searing pain that would come, as though he'd been shot through the chest all over again, as though Beachcomber was being controlled into trying to snuff his spark again. He had to steady himself against the desk as his optics went wide and intakes became ragged, strength abandoning him for the second time in his life. Where did that sensation come from? Was it one of his symbiotes? He knew Rewind was in the medibay still, the pain was ebbing from that-- wait, no. No, no, no, no, no this can't be happening.
A sad keen escaped the communications officer's vocalizer before another searing pain burned its way through his chest. If Rewind had passed away moments before, then this one was Eject. The grief-stricken mech couldn't believe that his twins, two of his closest friends that were actually more like children to him than anything else, were gone. He knew the red rust virus had been plaguing Rewind but he had no idea that it was fatal. He had no idea that it would claim the lives of the twins.
And Eject was aware of what was to happen as well. This thought hurt Blaster the most. Knowing that they were going to die and not even being able to do anything about it... There was so much that he wanted to tell them that he felt as though spark-break was going to take him down into depression. But now wasn't the time to fall apart. Two hundred Autobots depended on him to keep trying to get the subspace communications array back up so they could get messages in to Cybertron. There was no telling how long the others would wait further for that.
But whether Blaster liked it or not, the show must go on.