The character is Valkenhayn R. Hellsing, who is character Rachel's butler in the game's story. No availability or pricing has been announced, but Valkenhayn is expected to cost the same as the recently released Makoto, who cost $8.
A third DLC character is planned and strongly rumored to be Platinum. At the same event, Arc hinted at further plans for the arcade version of BlazBlue.
I love BB but I'll wait for a price drop for CS and then get all of the DLC characters at once for $8 a pop and save me some money
Its already $40. If the game doesn't get high enough sales I bet they're willing to just nix the DLC characters. Go out and get it!