Perkins was talking about the 9 Hells...
Aerdrie Faenya?? But she is not blind
I also think it may be about Zariel's Fall/Descent. Some random thoughts based on what is in MToF:
1. From her description before her statblock entry: "...many whisper that her true agenda is vengeance against Asmodeus, and her true plan is to drive him from the Nine Hells." Sets up a possible plot device/motivation.
2. More: "...Zariel is keenly interested in collecting souls from the greatest warriors on the Material Plane and securing their loyalty...she allows her mortal followers to live out their lives, ever honing their talents, so she can put them to the best use when she finally calls in their debts. As a result, Zariel's servants are universally effective, disciplined, and dangerous." Sets up the potential for minions/antagonists that the PC's encounter at lower levels...
3. From her statblock: Immolating Gaze. Perhaps somehow this power is linked to her when she was an angel, and hence the blindfold?
Could all be for naught, but fun to speculate.
The lovely kate welch said that this upcoming campaign book is the largest so far
2. More: "...Zariel is keenly interested in collecting souls from the greatest warriors on the Material Plane and securing their loyalty...she allows her mortal followers to live out their lives, ever honing their talents, so she can put them to the best use when she finally calls in their debts. As a result, Zariel's servants are universally effective, disciplined, and dangerous." Sets up the potential for minions/antagonists that the PC's encounter at lower levels...
The lovely kate welch said that this upcoming campaign book is the largest so far