Hey! Good question. Those are a custom image. I don't remember the specific folder off the top of my head, but if you open vTuber Kit and scroll to the bottom of the LIVE tab, it will tell you how to change it! You can open the image and erase the canvas and then save it to get rid of the bows. Don't delete the image file itself, it may cause errors. This is a temporary solution and will be changed in the future.