I've been playing CS again lately trying to get the DLC character story modes, and while playing Jin's I ran into the part where Jin was trying to fight Ragna, but his sword wouldn't listen to him. Ragna told him how Yukianesa was controlling him, not the other way around. Then Ragna told Jin that Jubei told him that when he mastered his sword and gained control of himself, he would become Ragna's greatest enemy. (Power of Order VS Ragna) Then Ragna told him that when that happened, he would finally fight Jin, a fight between brothers, not the Jin controlled by the sword. That pretty much shot Jin through the roof with anticipation, so he's still clearly into the idea of fighting Ragna. Just as himself, rather than being manipulated by outside forces.