Here are some tips from me  😁 :

• A little more detail  to the body
• Making the head have an orange tint because from what I know, his head is in the fire and not that his hair are fire but correct me if I'm wrong
• In the attack animation, try making some other things move rather than just his weapon thing

I started working on this before I saw your message, so.. here is my version of your
WARNING!: Flashing lights
OC