So, there’s a running theory that when a player goes grimdark, their aspect reverses itself. This is shown by Rose, a Seer of Light, who then goes grim-dark and acts like a Hero of Void. 

So if a Hero of Light, whose job is to shed light on knowledge, events and inner-workings of events, act like a Hero of Void when grimdark? What happens when a Hero of Void goes grimdark? And under what stressful circumstances would they transform?

Perhaps while feeling terrified,

hanging out in dark space, a known haunt of the Horrorterrors,

and being ignored and insulted by their only friends? 

So, if a Hero of Void goes Grimdark, wouldn’t they shed Light on their situation to whoever may be looking?