( I drew 1 and 2 but traced 3 and 4 and added my own details)

When Kai is in is 2nd form he can run fast, sharp hearing, smell, taste, and sight, and the fire around his ears and tails can attack who he wants with a swish of his tail or ears, and if they don't get taken out when the fire comes back from where ever it is and goes around his ears and tail, but if someone put it out new fire will grow around his ears and tail.

In his 3rd form, Kai speed increases so do his smell, hearing, sight, and taste. This time the fire is apart of Kai's ears, tails and paws, he can attack with the fire and also he can do fireballs by opening his snout. The line on his back is a replacement for the wings.

In his 4th form, Kai can fly, his speed increased more and so did his smelling, hearing, sight and taste. This time the fire is apart of Kai's ears, tails and paws, he can attack with the fire and also he can do fireballs, and flamethrower by opening his snout. He also can attack with his wings, when he wants to attack he flaps them and a bunch of fire comes out. He also can do a fire arrow with is tail by swishing it.

(Sorry if I did anything wrong, and if I missed anything then Ill say it in the story, so don't get confused)