When we made it to the archives, Kay stayed in the main room to help us pinpoint the location of the file and keep watch, while we went in to extract it.

Our access of the archives must have triggered an extra alarm. When the troopers started coming for us, Kay sealed us into the archives. He used the last moments of his life to locate the file and buy us more time to get it. I assume he destroyed the panel to keep the door from opening so they couldn't reach us.

[He is quiet for a moment, his forehead still pressed to Bodhi's shoulder, unwilling to move for the same reasons. He doesn't want anyone seeing the look on his face again. But even Cassian can't fully keep the pain out of his voice.]

His last word over the comm was 'climb'. [And Cassian had known then and there that Kay was shutting down. He had heard the distortion in his voice.]