When will they make free DLC costumes damn it. T_T
That's never gonna happen XD They've only had few free DLCs, the first from vanilla DOA5 which was a legacy pack for Tina, Kokoro, Helena, and Mila(Hers was Tina's original DOA1 outfit, the red variant), Kasumi's Ragnarrok DLC in Ultimate, and then the guest artist design for both Kasumi and Ayane but that was only to celebrate the CF 1,000,000 player download milestone and the outfits were basically half finished, half armour and half panties and bra. They also offered Mila's 2015 summer DLC swinsuit for free as well but that was only for PC players I believe due to a delay or something and it was limited time.
They also had Marie Rose's promotional red Bull for "free" but only for PS+ users and it was stupidly time limited, and of course they have yet to release the 2016 I'm a fighter code costumes for free and they're keeping it tournament exclusive which is dumb since not everyone could go to DOA festival last year or attend tournaments, if I could I would but I shouldn't have to just for a costume.