Just go for it. Even if noone else knows, it'll be cool. Maybe have the whole group cosplay to sessions every now and then.
I've also considered cosplaying my favorite D&D character, but it's going to be a while as he's a bit of a freak. So many extra limbs. Things happen when you play the same character for several IRL years.
The cosplay I'm planning for Akon this year is based off of my newest D&D character, which I intentionally made into a gijinka gallade. (3.x Edition: Multi-classed Soul Knife - Scout, prestige classing into Elocater. The dual mind blades form over the forearms, though still use the stats of short swords, as per the power description.)