I love your Koumajou Densetsu CAS, specially Sakuya, Youmu needs a 2 sword style, maybe like yoshimitsu style and Sakuya would be better with Natsu Style.
Thank you. For Youmu, I thought that Mitsurugi's style suited her more in terms of movement and efficiency. Sakuya benefits from ZWEI's style because of her main short sword weapon from Koumajou Densetsu as well as ZWEI's demeanor and the Dio Brando reference with EIN. I do think that Natsu's style gives Sakuya the illusion of time stopping.