Early this morning, Bandai Namco released "2B" from NieR: Automata as a playable DLC character for Soulcalibur VI. This was known ahead of time, as it was announced on December 13th that she would be released alongside Update V1.10 which would optimize network experiences and bring balance adjustments.
However, Update V1.10 was actually released early on PC two days ago, which allowed users with 3rd-party cracks to gain unauthorized access to 2B. Bandai Namco acknowledged issues with V1.10 and briefly rolled the patch back, but not before a few players were able to show off her moveset and her clothing options for custom character creations:
As seen in the screenshot, her costumes are one piece options, which means there won't be very many opportunities to mix-and-match, as this user notes.
There was a brief scare when players who downloaded the patch early received a ban notice, but it was a false alarm as it was part of the patch rollback that Bandai Namco was doing:
With all patch issues cleared up and 2B officially released, top players Kayane and SonicFox have already begun exploring setups and mixup options for her: