For the WayV gaming livestream, kisama used to be a very respectful way of adressing someone. Overtime, it started being used sarcastically/ironically and eventually the modern-day use of the word became an insult (often translated to "b*stard"). So the lady wasn't being rude to Ten, she was using the original meaning of the word. Another example is omae, another old respectful "you" pronoun, which is usually reserved to friends and family now as it became very rude for strangers. (The wishies use it all the time because they're close friends).