NightBear15 , you ask and I deliver!

Here's Jin!

As a Demon Slayer, Jin's Breathing Style would be Wind Breathing and he would know all nine forms (and his sword sheath would be in his coat sleeve for that dramatic SHING moment).

As a demon, his Blood Demon Art would be Spirit Wind. The winds he creates within his cloak can manifest into the ghostly forms of people his opponents have lost. He can psychically control these apparitions to do and say as he pleases - either to fight his enemies or to manipulate them into surrendering. He can also use simple wind gusts to parry incoming attacks.

What do you think? And who should I do next?

Remember, the choices are based off of my Elemental Masters AU.