This picture was drawn by SSJGoku007, another member of the Downwardspiral group. Kaiser is Yaecia's twin sister, who was stillborn and her soul lived on inside of Yaecia. She became a soul of rage due to Yaecia's treatment at the hands of Overlanders, who had raped and brainwashed her. Later on in the RP, Yaecia and Kaiser found a way to give Kaiser her own body, exactly like Yaecia's except with red eyes instead of sky blue ones, and no robotic limbs. Blade had, initially, thought of Kaiser as her evil side, but she eventually grew to be a beloved member of the family.

There is also alternate art for this pic, without the towels, which you can find here; https://www.furaffinity.net/view/15461852/.