If you snoop around the Exalted Hive grimore, you can find evidence of Eriana-3 (a exo apparently) talking to Toland, Eris, and a unknown guardian named Vell. In the Ir Yut card, the person being talked to is Eriana, which leads me to assume that the Deathsinger cut her down at some point, Note: this is speculation, backed up by the grimore cards I posses.