The attack happened on Nightshift 35.
Since then, the following have met with me:
Renamon, Dias Flac, Sangamon Taylor (S.T.), Allen Walker, Kunzite, Allelujah Haptism, Godot, Phoenix Wright on a number of occasions, Klavier Gavin, Naoto Shirogane, M. Javert, Mitsuru Kirijo, Jade Curtiss, and Lelouch Lamperouge.
I've omitted patients who are no longer in the Institute.