Does Madara use katon to insta dry his hair? Like a messed up and very dangerous blow dryer? He's fireproof so his hair should be undamaged by it. Random thought: Madara getting Izuna to blow a fireball jutsu at him because he has meeting in like 5 minutes and he took a shower too late and he can't arrive with wet hair so Izuna please send a deadly jutsu at him so he doesn't look like a drenched cat
Yup, for sure, it made me laugh so hard, I just had to draw this.
In addition to being Fireproof, Madara has a lot of additional quirks, one of them being the simple ability to catch fire. His chakra is dense enough to be ignited at the slightest energy shift, it's a whole skill to master, and you bet that Madara had some more trouble with it as a teenager.
As for the Katon usage as a blow-dryer, yes, of course he does that, as well as portable grill and walking heater, your local Madara is the swiss knife of fire uses. Jokes aside, his body temperature adjusts itself without his input, but he can also raise it drasically to the point a lot of Suiton would simply evaporate on contact (the Mokuton is actually great to smother the flames, and it'll eat the chakra from the Katon, in the context of battle)So it means, naturally, Madara gets dry faster, and he also can just put himself on fire, but it is more energy consuming when he's wet. The fire nature of Madara is very chakra hungry, it pushes the body in perpetual chakra stress and makes it hard for him to store fat.
Post-Konoha, when he finally manages to bulk, he's very proud of the physique he managed to achieve.
Also, fun fact, fireproof hair means fireproof fabric, I mentioned it in a post about Taiyō that she regularly cut her hair to have it spun and threaded and turned into fabric. Usually it's mixed with coton, so it's not fully fireproof, but it's good enough, and the indigo use makes sense because of its fire resistance, so it doesn't fade easily.
(All headcanon, of course)
