One of my favourite Unreliable Narrator moments to this day is in DA:I after the Blackwall reveal, Cullen's assessment of Leliana having the report on Renier but not saying anything is that she probably didn't connect the two people together because she's got a blind-spot for Wardens.
I understand why that's a reasonable assessment from him; Her history with the wardens is common in-world knowledge, the plot of Leliana's song is not. However from an outside perspective, I think it's far more likely Leliana did know, but that she has a soft spot for those seeking redemption from their past, given her own history.
It makes me smile every time I reach that point.
