Luke became a demon slayer at age 14 with being raised by dragons his whole life,being the key to his breathing techniques, he has ten breathing forms in total,but he recently discovered an eleventh form and is currently working on it,he became a hashira member around the age of 18 or 19

Demon slayer outfit:

(There's no cape or hood,and there are miniature dragons all around the outfits)

First form:dragon slash: its pretty much like the water slash technique except it leaves an after image after the strike in case the enemy thinks that he left his guard down

Second form:dead space: the technique is very unique to him only,if its able to work,then he's in a small area where nothing touches him,then he kills the enemy pretty quickly after

Third form: Lava rain + dance: in this form,he performs a special dance to start the move,and then blood clouds appear as lava pours down like rain and slowly kills the enemy or badly injures them.

Fourth form: dragon image: with this,he's able to create dozen's of after images and strikes when the time is right after confusing the enemy

Fifth form:Dragon Basin: if he falls from a high place or in a tight corner when fighting the enemy,his move creates a basin for him to break the fall or to escape the enemy

Sixth form:dragon dance:with this,he's able to make several swift moves around the area he's in and hits the target

Seventh form:dragon awareness:for this form,if he concentrates deeply,he's able to sense anyone or anything within the area he's in

Eighth form:Mist delusion: With this,he's able to create a large fog covering the entire area with his breathing to hide his presence

Ninth form:Volcanic eruption:this form shakes the whole area like an eruption about to start,the ground erupts with lava taking out any demons instantly like the sun

Tenth form: dragon flame:a powerful technique that  unleashes a series of strikes which takes the shape of a red dragon at high speed towards the enemy

Eleventh form:world's end: A powerful technique that traps the enemy in a ball of energy as the user slashes through,causing an explosion,vaporizing the enemy (this is a form he created by himself)