Tanjiro Kamado in Overlord Explained

Imagine a hero from another world, one where demons are real, and humanity's only defense lies in swordsmanship and unique breathing techniques. Now, picture that hero, Tanjiro Kamado, suddenly transported to the brutal, magic-infused world of Overlord. How would his extraordinary abilities, honed through unimaginable trials, fare against the denizens of Nazarick and the threats of the New World? Would his breath forms be seen as a new, potent form of martial arts, or perhaps even a rare type of divine power?...