just realized now that theres only 14 slots in the morgue, which makes sense given that THH only had 15 participants anyway. But also, I think it implies what the original use for them were.
DR0 tells us that the Tragedy of HPA happened in the Old School buildings (where THH later takes place), but also that no one has told they families of the Student Council that they have died. And the cover up was a main plotpoint of DR0, the Steering Committee REALLY wanted this to be buried.
The Student Council has 14 members, 13 died during the tragedy and Soshun was presumed braindead with the hopes he would die (and he would by Yasuke's hands)
The morgue was definitely made to safely store the bodies of the Student Council while The Steering Committee did damage control. Its even on the same floor as the classroom.
I love how intertwined THH and DR0 are, that you can go back and connect dots that you didn’t pick up on first time. This, plus the part where Yasuke dies in the trial room, and so much deepth to both the book and the game. It makes it feel soo much more dimensional.