You are a former Yiga assassin, which not many of your former colleagues liked so much...you are now their enemy. One day,you were out and about,and then you spot Sooga...cleaning blood off his sword.

He didn't have his mask or shirt on,since he was bleeding on his left side...Link must have done something to him. You look at him from a distance and felt a strange urge to help him...but...he is your enemy...