" Dragon Form " is Rio Wesley´s Abilty that will turn her into a Fire Dragon with Electricity, but gets Berserk. In Vivid Strike Dracu-Riot! (ep.1) Miu tries to inject her with Vampire-Syrum, when Rio feels strong pain in her Heart and goes into a Red fire Dragon with Electricity and escapes from the lab and got to Midchilda, when Rio recognized Corona, she returned to her normal form. In Vivid Strike (ep 5.5) When she got shocked by electric chain of Mastur Chief and tried to cut it, caused her to transform into a Fire Dragon with electricity and destroys Mastur Chief's electric chain, destroys also Goliath and Corona gets hurt and Rio regained consiousness and returned normal. She apologized to Corona for hurting her.