I'm using "Warden" to refer to the protagonist, not all wardens. It's a special DLC armour set with the game logo on it, and presumably meant to go on your protagonist, if you're playing a warrior, because it is so very special. But that's also kind of my point--the Warden (or the protagonist, if you prefer) HAS no clearly defined look, because every armour set, even that one, could be equipped to any other character. It's the most recognizable armour in the game, and it's not linked to any other character (codex doesn't count), but since the Warden is never shown wearing it in promo materials, it doesn't give all the different possible protagonists a unified look. That's all that I was saying.
I guess we just see it differently then, since to me the Blood Dragon armour was neither memorable nor special -- I thought it's a really tacky DLC piece that none of my characters bothered to wear. As such, it's really not something I consider most recognizable, and I'd expect the Warden-Commander armour set to be mentioned here instead, since it actually
is featured regularly in DA:O cg trailers and as such quite a few players seem to choose to wear it.
This reminds me (re: no memorable symbols) the trailer Warden is also shown sporting pretty distinctive tattoo, and I think having it available in game would've gone long way towards establishing "hey, this is DA Warden" recognition of cosplay characters, no matter their other individual features. Not unlike Hawke's blood smear, except less silly.