The first time I used setsuka was in soul calibur 4. Her disappearance in 5, was quite a odd thing to be honest and I didn’t understand the story reason she wasn’t included in that game alongside some other characters. Though her reappearance in soul calibur 6, felt pretty good actually to play as her in that game. However, playing against her in soul calibur 3 was quite difficult sometimes.
she is my main along with Xyanghua, on 3 she was not so deadly but in 6 damn she is fire. Most beautiful song in Namco IMO and honestly her DLC is gorgeous, my fav character. Her ending in 5 is gold.