I remember playing Soulcalibur II back when I was quite young, now one of the series' fan-favorites and a character that I personally remember playing, Nightmare makes his debut.
Siegfried or better known as Nightmare has been introduced to Soulcalibur VI by Producer Motohiro Okubo. Okubo discusses how Nightmare is one the more integral characters to the series.
Okubo talks about how they are quite impressed with the game that they have created and more so overall Okubo just wanted to say "that this game has ended up being absurdly cool" and that he "definitely encourage you all to pick it up and give it a shot."
Take a look at the above video to see some of Nightmares moves, the character has really come along since his introduction in the first installment of the Soul series - Soul Edge.