As I said in the last one, you would think since he narrates the majority of the story, I would know what Damien sounds like, but his accent is one of the hardest one to pin down. To go deeper than I did last time, it's probably because in my head it vacillates depending on certain points in the story (I don't expect you to do that; one accent is perfectly fine) I'll pretty much accept any non-thick English accent, though the ones in the accent section should be the typical ones that he sounds like the most. 

He tends to actually be a bit soft spoken and is somewhere in the tenor range.

He's in his late twenties (Damien is twenty-seven at the start of the story) 

I'm not going to expect whoever gets the role to narrate the whole game.