Hi! Name's Black, I'm an artisan and a blacksmith of the Red Libra Guild.
I bet you've never met such a skillful blacksmith as myself, eh? I can exchange weapons and armor of R-grade and higher. Also, you may buy an Elysium weapon from me.
Besides, I can change the type of your Dark and Bloody armor and exchange Talisman of Insanity and Talisman of Seven Signs. And that's not all! Well, what do you want me to do?