Dark Brethren's Journal, by Amaranta.
The more I try to be like the Rogue, the more connections – however tenuous – I can see. It makes me think. Me. My own thoughts. Anything is better than trying to think like her! We both wear masks. But hers doesn't even hide her identity! It doesn't strike fear into anyone. What's the point? And there's another thing! That whole pointed beak thing. It's ridiculous. She must have worn that thing for a reason, right? She wasn't uneasy on the eye from what I hear. And she wasn't one for attending masquerades. It looks like it's made of bone, but what sort of skull is that? A giant parrot? No. It's made up. It's another example of her ridiculous quirkiness. As false as fake coin! So maybe the mask isn't what it appears. It's not worn for effect. It must be worn for some other reason. It must have been useful to the Rogue in some other way. But how? Perhaps Duke will have more luck in the quest at Kraken's Fall.