Be aware that this story contains alot of spoilers from the official manga.
A story of how Yoriichi's unborn child actually survived and passed down the sun legacy to another... and that is, you. yes you! Tsugikuni Y/n.
Interest : The Insect Hashira...
-mostly called with "Tsugi-san". only mostly so don't worry.
Race: Human Ancient Bloodline
Gender: Male
Age: 17 Years Old
Affiliation: Demon Slayer Corps
Occupation: Demon Slayer Tsuguko -> ???
CombatStyle: Flame Breathing -> Sun Breathing
Yoriichi Tsugikuni, the creator of Sun Breathing then passed down to Tanjiro and Y/n that has never heard or seen eachother.
both descendants passed the style differently.
with the Kamado having passed down the dance type. which had unnecessary joint moves. but the Tsugikuni here still manages to kept the style as it is.
the original one.
So, just clearing it out, Tanjiro isn't actually the descendant of Yoriichi. It was actually his good friend, Sumiyoshi.
while with our Y/n, he is the real descendant of Yoriichi's son, and Yoriichi himself.
In conclusion, Y/N'S SUN BREATHING, AND TANJIRO'SHINOKAMIKAGURA IS DIFFERENT. TANJIRO'S ANCESTOR, SUMIYOSHI WAS TAUGHT BY YORIICHI WHO WAS HIS FRIEND. TANJIRO IS NOT BLOOD RELATED TO YORIICHI NOR TO Y/N. TANJIRO'S FAMILY COPIED IT AND MADE IT THEIR OWN AS A 'DANCE' BUT WITH TSUGIKUNI, STILL KEEPS THE ORIGINAL. TECHNIQUES THAT YORIICHI DID USE. I just wanted to make that clear because that will be important in the next few chapters.
(If you found any difference from the information that was given from the manga, yes. I seperated them.
In the official manga, yes, Tanjiro does eventually use the Sun Breath. but for this FANFIC it will only be applied that Tanjiro and Y/n is DIFFERENT.
Their technique names are different. even if, the move is the same, Tanjiro's version is weaker and that it has alot to improve upon.
The dance type and the original has a different way to call the moves. thus, they use the breathing styles very differently. this is the Sun Breathing. in this very style they call it:
Waltz
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The simplest Sun Breathing technique. A high-powered slash.
Note:
There is also an expanded move Y/n learned from Jigoro Kuwajima, the former Thunder Hashira. Basically, he combined Waltz, a powered slash along with Thunderclap and Flash, a rush slash.